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* mm: drop hotplug lock from lru_add_drain_all()Michal Hocko2018-02-013-10/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pulling cpu hotplug locks inside the mm core function like lru_add_drain_all just asks for problems and the recent lockdep splat [1] just proves this. While the usage in that particular case might be wrong we should avoid the locking as lru_add_drain_all() is used in many places. It seems that this is not all that hard to achieve actually. We have done the same thing for drain_all_pages which is analogous by commit a459eeb7b852 ("mm, page_alloc: do not depend on cpu hotplug locks inside the allocator"). All we have to care about is to handle - the work item might be executed on a different cpu in worker from unbound pool so it doesn't run on pinned on the cpu - we have to make sure that we do not race with page_alloc_cpu_dead calling lru_add_drain_cpu the first part is already handled because the worker calls lru_add_drain which disables preemption when calling lru_add_drain_cpu on the local cpu it is draining. The later is true because page_alloc_cpu_dead is called on the controlling CPU after the hotplugged CPU vanished completely. [1] http://lkml.kernel.org/r/089e0825eec8955c1f055c83d476@google.com [add a cpu hotplug locking interaction as per tglx] Link: http://lkml.kernel.org/r/20171116120535.23765-1-mhocko@kernel.org Signed-off-by: Michal Hocko <mhocko@suse.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Tejun Heo <tj@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Mel Gorman <mgorman@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm/mempolicy: add nodes_empty check in SYSC_migrate_pagesYisheng Xie2018-02-011-3/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As in manpage of migrate_pages, the errno should be set to EINVAL when none of the node IDs specified by new_nodes are on-line and allowed by the process's current cpuset context, or none of the specified nodes contain memory. However, when test by following case: new_nodes = 0; old_nodes = 0xf; ret = migrate_pages(pid, old_nodes, new_nodes, MAX); The ret will be 0 and no errno is set. As the new_nodes is empty, we should expect EINVAL as documented. To fix the case like above, this patch check whether target nodes AND current task_nodes is empty, and then check whether AND node_states[N_MEMORY] is empty. Link: http://lkml.kernel.org/r/1510882624-44342-4-git-send-email-xieyisheng1@huawei.com Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Andi Kleen <ak@linux.intel.com> Cc: Chris Salls <salls@cs.ucsb.edu> Cc: Christopher Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Tan Xiaojun <tanxiaojun@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm/mempolicy: fix the check of nodemask from userYisheng Xie2018-02-011-3/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As Xiaojun reported the ltp of migrate_pages01 will fail on arm64 system which has 4 nodes[0...3], all have memory and CONFIG_NODES_SHIFT=2: migrate_pages01 0 TINFO : test_invalid_nodes migrate_pages01 14 TFAIL : migrate_pages_common.c:45: unexpected failure - returned value = 0, expected: -1 migrate_pages01 15 TFAIL : migrate_pages_common.c:55: call succeeded unexpectedly In this case the test_invalid_nodes of migrate_pages01 will call: SYSC_migrate_pages as: migrate_pages(0, , {0x0000000000000001}, 64, , {0x0000000000000010}, 64) = 0 The new nodes specifies one or more node IDs that are greater than the maximum supported node ID, however, the errno is not set to EINVAL as expected. As man pages of set_mempolicy[1], mbind[2], and migrate_pages[3] mentioned, when nodemask specifies one or more node IDs that are greater than the maximum supported node ID, the errno should set to EINVAL. However, get_nodes only check whether the part of bits [BITS_PER_LONG*BITS_TO_LONGS(MAX_NUMNODES), maxnode) is zero or not, and remain [MAX_NUMNODES, BITS_PER_LONG*BITS_TO_LONGS(MAX_NUMNODES) unchecked. This patch is to check the bits of [MAX_NUMNODES, maxnode) in get_nodes to let migrate_pages set the errno to EINVAL when nodemask specifies one or more node IDs that are greater than the maximum supported node ID, which follows the manpage's guide. [1] http://man7.org/linux/man-pages/man2/set_mempolicy.2.html [2] http://man7.org/linux/man-pages/man2/mbind.2.html [3] http://man7.org/linux/man-pages/man2/migrate_pages.2.html Link: http://lkml.kernel.org/r/1510882624-44342-3-git-send-email-xieyisheng1@huawei.com Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com> Reported-by: Tan Xiaojun <tanxiaojun@huawei.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Andi Kleen <ak@linux.intel.com> Cc: Chris Salls <salls@cs.ucsb.edu> Cc: Christopher Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm/mempolicy: remove redundant check in get_nodesYisheng Xie2018-02-011-2/+0
| | | | | | | | | | | | | | | | | | | | | We have already checked whether maxnode is a page worth of bits, by: maxnode > PAGE_SIZE*BITS_PER_BYTE So no need to check it once more. Link: http://lkml.kernel.org/r/1510882624-44342-2-git-send-email-xieyisheng1@huawei.com Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Acked-by: David Rientjes <rientjes@google.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Chris Salls <salls@cs.ucsb.edu> Cc: Andi Kleen <ak@linux.intel.com> Cc: Christopher Lameter <cl@linux.com> Cc: Tan Xiaojun <tanxiaojun@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: relax deferred struct page requirementsPavel Tatashin2018-02-014-9/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is no need to have ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT, as all the page initialization code is in common code. Also, there is no need to depend on MEMORY_HOTPLUG, as initialization code does not really use hotplug memory functionality. So, we can remove this requirement as well. This patch allows to use deferred struct page initialization on all platforms with memblock allocator. Tested on x86, arm64, and sparc. Also, verified that code compiles on PPC with CONFIG_MEMORY_HOTPLUG disabled. Link: http://lkml.kernel.org/r/20171117014601.31606-1-pasha.tatashin@oracle.com Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> [s390] Reviewed-by: Khalid Aziz <khalid.aziz@oracle.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Steven Sistare <steven.sistare@oracle.com> Cc: Daniel Jordan <daniel.m.jordan@oracle.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Reza Arbab <arbab@linux.vnet.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Mel Gorman <mgorman@techsingularity.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* zswap: same-filled pages handlingSrividya Desireddy2018-02-011-5/+66
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Zswap is a cache which compresses the pages that are being swapped out and stores them into a dynamically allocated RAM-based memory pool. Experiments have shown that around 10-20% of pages stored in zswap are same-filled pages (i.e. contents of the page are all same), but these pages are handled as normal pages by compressing and allocating memory in the pool. This patch adds a check in zswap_frontswap_store() to identify same-filled page before compression of the page. If the page is a same-filled page, set zswap_entry.length to zero, save the same-filled value and skip the compression of the page and alloction of memory in zpool. In zswap_frontswap_load(), check if value of zswap_entry.length is zero corresponding to the page to be loaded. If zswap_entry.length is zero, fill the page with same-filled value. This saves the decompression time during load. On a ARM Quad Core 32-bit device with 1.5GB RAM by launching and relaunching different applications, out of ~64000 pages stored in zswap, ~11000 pages were same-value filled pages (including zero-filled pages) and ~9000 pages were zero-filled pages. An average of 17% of pages(including zero-filled pages) in zswap are same-value filled pages and 14% pages are zero-filled pages. An average of 3% of pages are same-filled non-zero pages. The below table shows the execution time profiling with the patch. Baseline With patch % Improvement ----------------------------------------------------------------- *Zswap Store Time 26.5ms 18ms 32% (of same value pages) *Zswap Load Time (of same value pages) 25.5ms 13ms 49% ----------------------------------------------------------------- On Ubuntu PC with 2GB RAM, while executing kernel build and other test scripts and running multimedia applications, out of 360000 pages stored in zswap 78000(~22%) of pages were found to be same-value filled pages (including zero-filled pages) and 64000(~17%) are zero-filled pages. So an average of %5 of pages are same-filled non-zero pages. The below table shows the execution time profiling with the patch. Baseline With patch % Improvement ----------------------------------------------------------------- *Zswap Store Time 91ms 74ms 19% (of same value pages) *Zswap Load Time 50ms 7.5ms 85% (of same value pages) ----------------------------------------------------------------- *The execution times may vary with test device used. Dan said: : I did test this patch out this week, and I added some instrumentation to : check the performance impact, and tested with a small program to try to : check the best and worst cases. : : When doing a lot of swap where all (or almost all) pages are same-value, I : found this patch does save both time and space, significantly. The exact : improvement in time and space depends on which compressor is being used, : but roughly agrees with the numbers you listed. : : In the worst case situation, where all (or almost all) pages have the : same-value *except* the final long (meaning, zswap will check each long on : the entire page but then still have to pass the page to the compressor), : the same-value check is around 10-15% of the total time spent in : zswap_frontswap_store(). That's a not-insignificant amount of time, but : it's not huge. Considering that most systems will probably be swapping : pages that aren't similar to the worst case (although I don't have any : data to know that), I'd say the improvement is worth the possible : worst-case performance impact. [srividya.dr@samsung.com: add memset_l instead of for loop] Link: http://lkml.kernel.org/r/20171018104832epcms5p1b2232e2236258de3d03d1344dde9fce0@epcms5p1 Signed-off-by: Srividya Desireddy <srividya.dr@samsung.com> Acked-by: Dan Streetman <ddstreet@ieee.org> Cc: Seth Jennings <sjenning@redhat.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: Dinakar Reddy Pathireddy <dinakar.p@samsung.com> Cc: SHARAN ALLUR <sharan.allur@samsung.com> Cc: RAJIB BASU <rajib.basu@samsung.com> Cc: JUHUN KIM <juhunkim@samsung.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Timofey Titovets <nefelim4ag@gmail.com> Cc: Andi Kleen <ak@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: kmemleak: remove unused hardirq.hYang Shi2018-02-011-1/+0
| | | | | | | | | | | | | | Preempt counter APIs have been split out, currently, hardirq.h just includes irq_enter/exit APIs which are not used by kmemleak at all. So, remove the unused hardirq.h. Link: http://lkml.kernel.org/r/1510959741-31109-1-git-send-email-yang.s@alibaba-inc.com Signed-off-by: Yang Shi <yang.s@alibaba-inc.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Matthew Wilcox <mawilcox@microsoft.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* include/linux/sched/mm.h: uninline mmdrop_async(), etcAndrew Morton2018-02-012-234/+238
| | | | | | | | | | | | | | mmdrop_async() is only used in fork.c. Move that and its support functions into fork.c, uninline it all. Quite a lot of code gets moved around to avoid forward declarations. Cc: Ingo Molnar <mingo@kernel.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* slub: remove obsolete comments of put_cpu_partial()Miles Chen2018-02-011-3/+1
| | | | | | | | | | | | | | | | | | | | Commit d6e0b7fa1186 ("slub: make dead caches discard free slabs immediately") makes put_cpu_partial() run with preemption disabled and interrupts disabled when calling unfreeze_partials(). The comment: "put_cpu_partial() is done without interrupts disabled and without preemption disabled" looks obsolete, so remove it. Link: http://lkml.kernel.org/r/1516968550-1520-1-git-send-email-miles.chen@mediatek.com Signed-off-by: Miles Chen <miles.chen@mediatek.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Vladimir Davydov <vdavydov.dev@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm/slub.c: fix wrong address during slab padding restorationBalasubramani Vivekanandan2018-02-011-3/+5
| | | | | | | | | | | | | | | Start address calculated for slab padding restoration was wrong. Wrong address would point to some section before padding and could cause corruption Link: http://lkml.kernel.org/r/1516604578-4577-1-git-send-email-balasubramani_vivekanandan@mentor.com Signed-off-by: Balasubramani Vivekanandan <balasubramani_vivekanandan@mentor.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm/slab.c: remove redundant assignments for slab_stateOscar Salvador2018-02-011-4/+0
| | | | | | | | | | | | | | | | | | | | | | | slab_state is being set to "UP" in create_kmalloc_caches(), and later on we set it again in kmem_cache_init_late(), but slab_state does not change in the meantime. Remove the redundant assignment from kmem_cache_init_late(). And unless I overlooked anything, the same goes for "slab_state = FULL". slab_state is set to "FULL" in kmem_cache_init_late(), but it is later being set again in cpucache_init(), which gets called from do_initcall_level(). So remove the assignment from cpucache_init() as well. Link: http://lkml.kernel.org/r/20171215134452.GA1920@techadventures.net Signed-off-by: Oscar Salvador <osalvador@techadventures.net> Acked-by: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm/slab_common.c: make calculate_alignment() staticByongho Lee2018-02-012-30/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | calculate_alignment() function is only used inside slab_common.c. So make it static and let the compiler do more optimizations. After this patch there's a small improvement in text and data size. $ gcc --version gcc (GCC) 7.2.1 20171128 Before: text data bss dec hex filename 9890457 3828702 1212364 14931523 e3d643 vmlinux After: text data bss dec hex filename 9890437 3828670 1212364 14931471 e3d60f vmlinux Also I fixed a style problem reported by checkpatch. WARNING: Missing a blank line after declarations #53: FILE: mm/slab_common.c:286: + unsigned long ralign = cache_line_size(); + while (size <= ralign / 2) Link: http://lkml.kernel.org/r/20171210080132.406-1-bhlee.kernel@gmail.com Signed-off-by: Byongho Lee <bhlee.kernel@gmail.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ocfs2: return error when we attempt to access a dirty bh in jbd2piaojun2018-02-011-11/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We should not reuse the dirty bh in jbd2 directly due to the following situation: 1. When removing extent rec, we will dirty the bhs of extent rec and truncate log at the same time, and hand them over to jbd2. 2. The bhs are submitted to jbd2 area successfully. 3. The write-back thread of device help flush the bhs to disk but encounter write error due to abnormal storage link. 4. After a while the storage link become normal. Truncate log flush worker triggered by the next space reclaiming found the dirty bh of truncate log and clear its 'BH_Write_EIO' and then set it uptodate in __ocfs2_journal_access(): ocfs2_truncate_log_worker ocfs2_flush_truncate_log __ocfs2_flush_truncate_log ocfs2_replay_truncate_records ocfs2_journal_access_di __ocfs2_journal_access // here we clear io_error and set 'tl_bh' uptodata. 5. Then jbd2 will flush the bh of truncate log to disk, but the bh of extent rec is still in error state, and unfortunately nobody will take care of it. 6. At last the space of extent rec was not reduced, but truncate log flush worker have given it back to globalalloc. That will cause duplicate cluster problem which could be identified by fsck.ocfs2. Sadly we can hardly revert this but set fs read-only in case of ruining atomicity and consistency of space reclaim. Link: http://lkml.kernel.org/r/5A6E8092.8090701@huawei.com Fixes: acf8fdbe6afb ("ocfs2: do not BUG if buffer not uptodate in __ocfs2_journal_access") Signed-off-by: Jun Piao <piaojun@huawei.com> Reviewed-by: Yiwen Jiang <jiangyiwen@huawei.com> Reviewed-by: Changwei Ge <ge.changwei@h3c.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <jiangqi903@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ocfs2: unlock bh_state if bg check failsChangwei Ge2018-02-011-0/+2
| | | | | | | | | | | | | | | | We should unlock bh_stat if bg->bg_free_bits_count > bg->bg_bits Link: http://lkml.kernel.org/r/1516843095-23680-1-git-send-email-ge.changwei@h3c.com Signed-off-by: Changwei Ge <ge.changwei@h3c.com> Suggested-by: Jan Kara <jack@suse.cz> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <jiangqi903@gmail.com> Cc: Changwei Ge <ge.changwei@h3c.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ocfs2: nowait aio supportGang He2018-02-016-33/+104
| | | | | | | | | | | | | | | | | | | | | | | | | Return EAGAIN if any of the following checks fail for direct I/O: - Cannot get the related locks immediately - Blocks are not allocated at the write location, it will trigger block allocation and block IO operations. [ghe@suse.com: v4] Link: http://lkml.kernel.org/r/1516007283-29932-4-git-send-email-ghe@suse.com [ghe@suse.com: v2] Link: http://lkml.kernel.org/r/1511944612-9629-4-git-send-email-ghe@suse.com Link: http://lkml.kernel.org/r/1511775987-841-4-git-send-email-ghe@suse.com Signed-off-by: Gang He <ghe@suse.com> Reviewed-by: Alex Chen <alex.chen@huawei.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <jiangqi903@gmail.com> Cc: Changwei Ge <ge.changwei@h3c.com> Cc: Jun Piao <piaojun@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ocfs2: add ocfs2_overwrite_io()Gang He2018-02-012-0/+48
| | | | | | | | | | | | | | | | | | | | | | Add ocfs2_overwrite_io function, which is used to judge if overwrite allocated blocks, otherwise, the write will bring extra block allocation overhead. [ghe@suse.com: v3] Link: http://lkml.kernel.org/r/1514455665-16325-3-git-send-email-ghe@suse.com [ghe@suse.com: v2] Link: http://lkml.kernel.org/r/1511944612-9629-3-git-send-email-ghe@suse.com Link: http://lkml.kernel.org/r/1511775987-841-3-git-send-email-ghe@suse.com Signed-off-by: Gang He <ghe@suse.com> Reviewed-by: Changwei Ge <ge.changwei@h3c.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <jiangqi903@gmail.com> Cc: Jun Piao <piaojun@huawei.com> Cc: alex chen <alex.chen@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ocfs2: add ocfs2_try_rw_lock() and ocfs2_try_inode_lock()Gang He2018-02-012-0/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch series "ocfs2: add nowait aio support", v4. VFS layer has introduced the non-blocking aio flag IOCB_NOWAIT, which tells the kernel to bail out if an AIO request will block for reasons such as file allocations, or writeback triggering, or would block while allocating requests while performing direct I/O. Subsequently, pwritev2/preadv2 also can leverage this part of kernel code. So far, ext4/xfs/btrfs have supported this feature. Add the related code for the ocfs2 file system. This patch (of 3): Add ocfs2_try_rw_lock and ocfs2_try_inode_lock functions, which will be used in non-blocking IO scenarios. [ghe@suse.com: v2] Link: http://lkml.kernel.org/r/1511944612-9629-2-git-send-email-ghe@suse.com Link: http://lkml.kernel.org/r/1511775987-841-2-git-send-email-ghe@suse.com Signed-off-by: Gang He <ghe@suse.com> Reviewed-by: Jun Piao <piaojun@huawei.com> Acked-by: alex chen <alex.chen@huawei.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <jiangqi903@gmail.com> Cc: Changwei Ge <ge.changwei@h3c.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ocfs2: add trimfs lock to avoid duplicated trims in clusterGang He2018-02-011-0/+44
| | | | | | | | | | | | | | | | | | | | | | | | | ocfs2 supports trimming the underlying disk via the fstrim command. But there is a problem, ocfs2 is a shared disk cluster file system, if the user configures a scheduled fstrim job on each file system node, this will trigger multiple nodes trimming a shared disk simultaneously, which is very wasteful for CPU and IO consumption. This also might negatively affect the lifetime of poor-quality SSD devices. So we introduce a trimfs dlm lock to communicate with each other in this case, which will make only one fstrim command to do the trimming on a shared disk among the cluster. The fstrim commands from the other nodes should wait for the first fstrim to finish and return success directly, to avoid running the same trim on the shared disk again. Link: http://lkml.kernel.org/r/1513228484-2084-2-git-send-email-ghe@suse.com Signed-off-by: Gang He <ghe@suse.com> Reviewed-by: Changwei Ge <ge.changwei@h3c.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <jiangqi903@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ocfs2: add trimfs dlm lock resourceGang He2018-02-014-0/+121
| | | | | | | | | | | | | | | Introduce a new dlm lock resource, which will be used to communicate during fstrimming of an ocfs2 device from cluster nodes. Link: http://lkml.kernel.org/r/1513228484-2084-1-git-send-email-ghe@suse.com Signed-off-by: Gang He <ghe@suse.com> Reviewed-by: Changwei Ge <ge.changwei@h3c.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <jiangqi903@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ocfs2: try to reuse extent block in dealloc without meta_allocChangwei Ge2018-02-013-10/+203
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A crash issue was reported by John Lightsey with a call trace as follows: ocfs2_split_extent+0x1ad3/0x1b40 [ocfs2] ocfs2_change_extent_flag+0x33a/0x470 [ocfs2] ocfs2_mark_extent_written+0x172/0x220 [ocfs2] ocfs2_dio_end_io+0x62d/0x910 [ocfs2] dio_complete+0x19a/0x1a0 do_blockdev_direct_IO+0x19dd/0x1eb0 __blockdev_direct_IO+0x43/0x50 ocfs2_direct_IO+0x8f/0xa0 [ocfs2] generic_file_direct_write+0xb2/0x170 __generic_file_write_iter+0xc3/0x1b0 ocfs2_file_write_iter+0x4bb/0xca0 [ocfs2] __vfs_write+0xae/0xf0 vfs_write+0xb8/0x1b0 SyS_write+0x4f/0xb0 system_call_fastpath+0x16/0x75 The BUG code told that extent tree wants to grow but no metadata was reserved ahead of time. From my investigation into this issue, the root cause it that although enough metadata is not reserved, there should be enough for following use. Rightmost extent is merged into its left one due to a certain times of marking extent written. Because during marking extent written, we got many physically continuous extents. At last, an empty extent showed up and the rightmost path is removed from extent tree. Add a new mechanism to reuse extent block cached in dealloc which were just unlinked from extent tree to solve this crash issue. Criteria is that during marking extents *written*, if extent rotation and merging results in unlinking extent with growing extent tree later without any metadata reserved ahead of time, try to reuse those extents in dealloc in which deleted extents are cached. Also, this patch addresses the issue John reported that ::dw_zero_count is not calculated properly. After applying this patch, the issue John reported was gone. Thanks for the reproducer provided by John. And this patch has passed ocfs2-test(29 cases) suite running by New H3C Group. [ge.changwei@h3c.com: fix static checker warnning] Link: http://lkml.kernel.org/r/63ADC13FD55D6546B7DECE290D39E373F29196AE@H3CMLB12-EX.srv.huawei-3com.com [akpm@linux-foundation.org: brelse(NULL) is legal] Link: http://lkml.kernel.org/r/1515479070-32653-2-git-send-email-ge.changwei@h3c.com Signed-off-by: Changwei Ge <ge.changwei@h3c.com> Reported-by: John Lightsey <john@nixnuts.net> Tested-by: John Lightsey <john@nixnuts.net> Cc: Joel Becker <jlbec@evilplan.org> Cc: Joseph Qi <jiangqi903@gmail.com> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Dan Carpenter <dan.carpenter@oracle.com> Cc: Mark Fasheh <mfasheh@versity.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ocfs2: make metadata estimation accurate and clearChangwei Ge2018-02-011-1/+3
| | | | | | | | | | | | | | | | | | Current code assume that ::w_unwritten_list always has only one item on. This is not right and hard to get understood. So improve how to count unwritten item. Link: http://lkml.kernel.org/r/1515479070-32653-1-git-send-email-ge.changwei@h3c.com Signed-off-by: Changwei Ge <ge.changwei@h3c.com> Reported-by: John Lightsey <john@nixnuts.net> Tested-by: John Lightsey <john@nixnuts.net> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joseph Qi <jiangqi903@gmail.com> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Changwei Ge <ge.changwei@h3c.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ocfs2/acl: use 'ip_xattr_sem' to protect getting extended attributepiaojun2018-02-012-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The race between *set_acl and *get_acl will cause getting incomplete xattr data as below: processA processB ocfs2_set_acl ocfs2_xattr_set __ocfs2_xattr_set_handle ocfs2_get_acl_nolock ocfs2_xattr_get_nolock: processB may get incomplete xattr data if processA hasn't set_acl done. So we should use 'ip_xattr_sem' to protect getting extended attribute in ocfs2_get_acl_nolock(), as other processes could be changing it concurrently. Link: http://lkml.kernel.org/r/5A5DDCFF.7030001@huawei.com Signed-off-by: Jun Piao <piaojun@huawei.com> Reviewed-by: Alex Chen <alex.chen@huawei.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <jiangqi903@gmail.com> Cc: Changwei Ge <ge.changwei@h3c.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ocfs2: clean up dead code in alloc.cChangwei Ge2018-02-011-9/+2
| | | | | | | | | | | | | | | Some stack variables are no longer used but still assigned. Trim them. Link: http://lkml.kernel.org/r/1516105069-12643-1-git-send-email-ge.changwei@h3c.com Signed-off-by: Changwei Ge <ge.changwei@h3c.com> Reviewed-by: Jun Piao <piaojun@huawei.com> Reviewed-by: Alex Chen <alex.chen@huawei.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <jiangqi903@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ocfs2/xattr: assign errno to 'ret' in ocfs2_calc_xattr_init()piaojun2018-02-011-0/+1
| | | | | | | | | | | | | | | | | | We need catch the errno returned by ocfs2_xattr_get_nolock() and assign it to 'ret' for printing and noticing upper callers. Link: http://lkml.kernel.org/r/5A571CAF.8050709@huawei.com Signed-off-by: Jun Piao <piaojun@huawei.com> Reviewed-by: Alex Chen <alex.chen@huawei.com> Reviewed-by: Yiwen Jiang <jiangyiwen@huawei.com> Acked-by: Gang He <ghe@suse.com> Acked-by: Changwei Ge <ge.changwei@h3c.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <jiangqi903@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ocfs2: try a blocking lock before return AOP_TRUNCATED_PAGEGang He2018-02-011-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If we can't get inode lock immediately in the function ocfs2_inode_lock_with_page() when reading a page, we should not return directly here, since this will lead to a softlockup problem when the kernel is configured with CONFIG_PREEMPT is not set. The method is to get a blocking lock and immediately unlock before returning, this can avoid CPU resource waste due to lots of retries, and benefits fairness in getting lock among multiple nodes, increase efficiency in case modifying the same file frequently from multiple nodes. The softlockup crash (when set /proc/sys/kernel/softlockup_panic to 1) looks like: Kernel panic - not syncing: softlockup: hung tasks CPU: 0 PID: 885 Comm: multi_mmap Tainted: G L 4.12.14-6.1-default #1 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 Call Trace: <IRQ> dump_stack+0x5c/0x82 panic+0xd5/0x21e watchdog_timer_fn+0x208/0x210 __hrtimer_run_queues+0xcc/0x200 hrtimer_interrupt+0xa6/0x1f0 smp_apic_timer_interrupt+0x34/0x50 apic_timer_interrupt+0x96/0xa0 </IRQ> RIP: 0010:unlock_page+0x17/0x30 RSP: 0000:ffffaf154080bc88 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: dead000000000100 RBX: fffff21e009f5300 RCX: 0000000000000004 RDX: dead0000000000ff RSI: 0000000000000202 RDI: fffff21e009f5300 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffaf154080bb00 R10: ffffaf154080bc30 R11: 0000000000000040 R12: ffff993749a39518 R13: 0000000000000000 R14: fffff21e009f5300 R15: fffff21e009f5300 ocfs2_inode_lock_with_page+0x25/0x30 [ocfs2] ocfs2_readpage+0x41/0x2d0 [ocfs2] filemap_fault+0x12b/0x5c0 ocfs2_fault+0x29/0xb0 [ocfs2] __do_fault+0x1a/0xa0 __handle_mm_fault+0xbe8/0x1090 handle_mm_fault+0xaa/0x1f0 __do_page_fault+0x235/0x4b0 trace_do_page_fault+0x3c/0x110 async_page_fault+0x28/0x30 RIP: 0033:0x7fa75ded638e RSP: 002b:00007ffd6657db18 EFLAGS: 00010287 RAX: 000055c7662fb700 RBX: 0000000000000001 RCX: 000055c7662fb700 RDX: 0000000000001770 RSI: 00007fa75e909000 RDI: 000055c7662fb700 RBP: 0000000000000003 R08: 000000000000000e R09: 0000000000000000 R10: 0000000000000483 R11: 00007fa75ded61b0 R12: 00007fa75e90a770 R13: 000000000000000e R14: 0000000000001770 R15: 0000000000000000 About performance improvement, we can see the testing time is reduced, and CPU utilization decreases, the detailed data is as follows. I ran multi_mmap test case in ocfs2-test package in a three nodes cluster. Before applying this patch: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2754 ocfs2te+ 20 0 170248 6980 4856 D 80.73 0.341 0:18.71 multi_mmap 1505 root rt 0 222236 123060 97224 S 2.658 6.015 0:01.44 corosync 5 root 20 0 0 0 0 S 1.329 0.000 0:00.19 kworker/u8:0 95 root 20 0 0 0 0 S 1.329 0.000 0:00.25 kworker/u8:1 2728 root 20 0 0 0 0 S 0.997 0.000 0:00.24 jbd2/sda1-33 2721 root 20 0 0 0 0 S 0.664 0.000 0:00.07 ocfs2dc-3C8CFD4 2750 ocfs2te+ 20 0 142976 4652 3532 S 0.664 0.227 0:00.28 mpirun ocfs2test@tb-node2:~>multiple_run.sh -i ens3 -k ~/linux-4.4.21-69.tar.gz -o ~/ocfs2mullog -C hacluster -s pcmk -n tb-node2,tb-node1,tb-node3 -d /dev/sda1 -b 4096 -c 32768 -t multi_mmap /mnt/shared Tests with "-b 4096 -C 32768" Thu Dec 28 14:44:52 CST 2017 multi_mmap..................................................Passed. Runtime 783 seconds. After apply this patch: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2508 ocfs2te+ 20 0 170248 6804 4680 R 54.00 0.333 0:55.37 multi_mmap 155 root 20 0 0 0 0 S 2.667 0.000 0:01.20 kworker/u8:3 95 root 20 0 0 0 0 S 2.000 0.000 0:01.58 kworker/u8:1 2504 ocfs2te+ 20 0 142976 4604 3480 R 1.667 0.225 0:01.65 mpirun 5 root 20 0 0 0 0 S 1.000 0.000 0:01.36 kworker/u8:0 2482 root 20 0 0 0 0 S 1.000 0.000 0:00.86 jbd2/sda1-33 299 root 0 -20 0 0 0 S 0.333 0.000 0:00.13 kworker/2:1H 335 root 0 -20 0 0 0 S 0.333 0.000 0:00.17 kworker/1:1H 535 root 20 0 12140 7268 1456 S 0.333 0.355 0:00.34 haveged 1282 root rt 0 222284 123108 97224 S 0.333 6.017 0:01.33 corosync ocfs2test@tb-node2:~>multiple_run.sh -i ens3 -k ~/linux-4.4.21-69.tar.gz -o ~/ocfs2mullog -C hacluster -s pcmk -n tb-node2,tb-node1,tb-node3 -d /dev/sda1 -b 4096 -c 32768 -t multi_mmap /mnt/shared Tests with "-b 4096 -C 32768" Thu Dec 28 15:04:12 CST 2017 multi_mmap..................................................Passed. Runtime 487 seconds. Link: http://lkml.kernel.org/r/1514447305-30814-1-git-send-email-ghe@suse.com Fixes: 1cce4df04f37 ("ocfs2: do not lock/unlock() inode DLM lock") Signed-off-by: Gang He <ghe@suse.com> Reviewed-by: Eric Ren <zren@suse.com> Acked-by: alex chen <alex.chen@huawei.com> Acked-by: piaojun <piaojun@huawei.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <jiangqi903@gmail.com> Cc: Changwei Ge <ge.changwei@h3c.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ocfs2: return -EROFS to mount.ocfs2 if inode block is invalidpiaojun2018-02-011-3/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If metadata is corrupted such as 'invalid inode block', we will get failed by calling 'mount()' and then set filesystem readonly as below: ocfs2_mount ocfs2_initialize_super ocfs2_init_global_system_inodes ocfs2_iget ocfs2_read_locked_inode ocfs2_validate_inode_block ocfs2_error ocfs2_handle_error ocfs2_set_ro_flag(osb, 0); // set readonly In this situation we need return -EROFS to 'mount.ocfs2', so that user can fix it by fsck. And then mount again. In addition, 'mount.ocfs2' should be updated correspondingly as it only return 1 for all errno. And I will post a patch for 'mount.ocfs2' too. Link: http://lkml.kernel.org/r/5A4302FA.2010606@huawei.com Signed-off-by: Jun Piao <piaojun@huawei.com> Reviewed-by: Alex Chen <alex.chen@huawei.com> Reviewed-by: Joseph Qi <jiangqi903@gmail.com> Reviewed-by: Changwei Ge <ge.changwei@h3c.com> Reviewed-by: Gang He <ghe@suse.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ocfs2: clean dead code in suballoc.cChangwei Ge2018-02-011-3/+3
| | | | | | | | | | | | | | | Stack variable fe is no longer used, so trim it to save some CPU cycles and stack space. Link: http://lkml.kernel.org/r/63ADC13FD55D6546B7DECE290D39E373F1F5A8DD@H3CMLB14-EX.srv.huawei-3com.com Signed-off-by: Changwei Ge <ge.changwei@h3c.com> Reviewed-by: Joseph Qi <jiangqi903@gmail.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Changwei Ge <ge.changwei@h3c.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ocfs2: use the OCFS2_XATTR_ROOT_SIZE macro in ocfs2_reflink_xattr_header()alex chen2018-02-011-1/+1
| | | | | | | | | | | | | | | | Use the OCFS2_XATTR_ROOT_SIZE macro improves the readability of the code. Link: http://lkml.kernel.org/r/5A2E2488.70301@huawei.com Signed-off-by: Alex Chen <alex.chen@huawei.com> Reviewed-by: Jun Piao <piaojun@huawei.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <jiangqi903@gmail.com> Cc: Changwei Ge <ge.changwei@h3c.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ocfs2/cluster: close a race that fence can't be triggeredYang Zhang2018-02-011-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When some nodes of cluster face with TCP connection fault, ocfs2 will pick up a quorum to continue to work and other nodes will be fenced by resetting host. In order to decide which node should be fenced, ocfs2 leverages o2quo_state::qs_holds. If that variable is reduced to zero, then a try to decide if fence local node is performed. However, under a specific scenario that local node is not disconnected from others at the same time, above method has a problem to reduce ::qs_holds to zero. Because, o2net 90s idle timer corresponding to different nodes is triggered one after another. node 2 node 3 90s idle timer elapses clear ::qs_conn_bm set hold 40s is passed 90 idle timer elapses clear ::qs_conn_bm set hold still up timer elapses clear hold (NOT to zero ) 90s idle timer elapses AGAIN still up timer elapses. clear hold still up timer elapses To solve this issue, a node which has already be evicted from ::qs_conn_bm can't set hold again and again invoked from idle timer. Link: http://lkml.kernel.org/r/63ADC13FD55D6546B7DECE290D39E373F1F3F93B@H3CMLB12-EX.srv.huawei-3com.com Signed-off-by: Yang Zhang <zhang.yangB@h3c.com> Signed-off-by: Changwei Ge <ge.changwei@h3c.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <jiangqi903@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ocfs2: give an obvious tip for mismatched cluster namesGang He2018-02-011-2/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add an obvious error message, due to mismatched cluster names between on-disk and in the current cluster. We can meet this case during OCFS2 cluster migration. If we can give the user an obvious tip for why they can not mount the file system after migration, they can quickly fix this mismatch problem. Second, also move printing ocfs2_fill_super() errno to the front of ocfs2_dismount_volume(), since ocfs2_dismount_volume() will also print its own message. I looked through all the code of OCFS2 (include o2cb); there is not any place which returns this error. In fact, the function calling path ocfs2_fill_super -> ocfs2_mount_volume -> ocfs2_dlm_init -> dlm_new_lockspace is a very specific one. We can use this errno to give the user a more clear tip, since this case is a little common during cluster migration, but the customer can quickly get the failure cause if there is a error printed. Also, I think it is not possible to add this errno in the o2cb path during ocfs2_dlm_init(), since the o2cb code has been stable for a long time. We only print this error tip when the user uses pcmk stack, since using the o2cb stack the user will not meet this error. [ghe@suse.com: v2] Link: http://lkml.kernel.org/r/1495419305-3780-1-git-send-email-ghe@suse.com Link: http://lkml.kernel.org/r/1495089336-19312-1-git-send-email-ghe@suse.com Signed-off-by: Gang He <ghe@suse.com> Reviewed-by: Mark Fasheh <mfasheh@versity.com> Acked-by: Joseph Qi <jiangqi903@gmail.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <jiangqi903@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ocfs2/cluster: neaten a member of o2net_msg_handlerChangwei Ge2018-02-011-1/+1
| | | | | | | | | | | | | | | | It's odd that o2net_msg_handler::nh_func_data is declared as type o2net_msg_handler_func*. So neaten it. Link: http://lkml.kernel.org/r/63ADC13FD55D6546B7DECE290D39E373F1F554DA@H3CMLB14-EX.srv.huawei-3com.com Signed-off-by: Changwei Ge <ge.changwei@h3c.com> Reviewed-by: Joseph Qi <jiangqi903@gmail.com> Reviewed-by: Alex Chen <alex.chen@huawei.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Changwei Ge <ge.changwei@h3c.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fs/ocfs2/dlm/dlmmaster.c: clean up dead codeChangwei Ge2018-02-011-7/+0
| | | | | | | | | | | | | | | This code has been commented out for 12 years. Remove it. Link: http://lkml.kernel.org/r/63ADC13FD55D6546B7DECE290D39E373CED7EF9E@H3CMLB14-EX.srv.huawei-3com.com Signed-off-by: Changwei Ge <ge.changwei@h3c.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <jiangqi903@gmail.com> Cc: Changwei Ge <ge.changwei@h3c.com> Cc: alex chen <alex.chen@huawei.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* m32r: remove abort()Sudip Mukherjee2018-02-011-8/+0
| | | | | | | | | | | | | Commit 7c2c11b208be ("arch: define weak abort()") has introduced a weak abort() which is common for all arch. And, so we will not need arch specific abort which has the same code as the weak abort(). Remove the abort() for m32r. Link: http://lkml.kernel.org/r/1516912339-5665-1-git-send-email-sudipm.mukherjee@gmail.com Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* scripts/tags.sh: change find_other_sources() for include directoriesArend van Spriel2018-02-011-1/+1
| | | | | | | | | | | | | | | | | | | | | | The current find done in find_other_sources() excludes directories in the kernel tree that are named 'include', eg.: ./security/apparmor/include ./security/selinux/include ./drivers/net/wireless/broadcom/brcm80211/include ./drivers/gpu/drm/amd/acp/include ./drivers/gpu/drm/amd/display/include ./drivers/gpu/drm/amd/include ./drivers/gpu/drm/nouveau/include This changes the find command in find_other_sources() to include those using the -path option. Link: http://lkml.kernel.org/r/1513335768-7852-1-git-send-email-arend.vanspriel@broadcom.com Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com> Cc: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* scripts/decodecode: make it take multiline Code lineAndy Shevchenko2018-02-011-0/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In case of running scripts/decodecode without any parameters in order to give a copy'n'pasted Code line from, for example, email it would parse only first line of it, while in emails it's split to few. ie, when you have a file out of oops the Code line looks like Code: hh hh ... <hh> ... hh\n When copy'n'paste from, for example, email where sender or some middle MTA split it, the line looks like: Code: hh hh ... hh\n hh ... <hh> ... hh\n hh hh ... hh\n The Code line followed by another oops line usually contains characters out of hex digit + space + < + > set. So add logic to join this split back if and only if the following lines have hex digits, or spaces, or '<', or '>' characters. It will be quite unlikely to have a broken input in well formed Oops or dmesg, thus a simple regex is being used. Link: http://lkml.kernel.org/r/20171212100323.33201-1-andriy.shevchenko@linux.intel.com Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Dave Martin <Dave.Martin@arm.com> Cc: Philippe Ombredanne <pombredanne@nexb.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fs/dax.c: release PMD lock even when there is no PMD support in DAXJan H. Schönherr2018-02-011-1/+1
| | | | | | | | | | | | | | | | follow_pte_pmd() can theoretically return after having acquired a PMD lock, even when DAX was not compiled with CONFIG_FS_DAX_PMD. Release the PMD lock unconditionally. Link: http://lkml.kernel.org/r/20180118133839.20587-1-jschoenh@amazon.de Fixes: f729c8c9b24f ("dax: wrprotect pmd_t in dax_mapping_entry_mkclean") Signed-off-by: Jan H. Schönherr <jschoenh@amazon.de> Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Matthew Wilcox <mawilcox@microsoft.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdmaLinus Torvalds2018-01-31187-3999/+10211
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull RDMA subsystem updates from Jason Gunthorpe: "Overall this cycle did not have any major excitement, and did not require any shared branch with netdev. Lots of driver updates, particularly of the scale-up and performance variety. The largest body of core work was Parav's patches fixing and restructing some of the core code to make way for future RDMA containerization. Summary: - misc small driver fixups to bnxt_re/hfi1/qib/hns/ocrdma/rdmavt/vmw_pvrdma/nes - several major feature adds to bnxt_re driver: SRIOV VF RoCE support, HugePages support, extended hardware stats support, and SRQ support - a notable number of fixes to the i40iw driver from debugging scale up testing - more work to enable the new hip08 chip in the hns driver - misc small ULP fixups to srp/srpt//ipoib - preparation for srp initiator and target to support the RDMA-CM protocol for connections - add RDMA-CM support to srp initiator, srp target is still a WIP - fixes for a couple of places where ipoib could spam the dmesg log - fix encode/decode of FDR/EDR data rates in the core - many patches from Parav with ongoing work to clean up inconsistencies and bugs in RoCE support around the rdma_cm - mlx5 driver support for the userspace features 'thread domain', 'wallclock timestamps' and 'DV Direct Connected transport'. Support for the firmware dual port rocee capability - core support for more than 32 rdma devices in the char dev allocation - kernel doc updates from Randy Dunlap - new netlink uAPI for inspecting RDMA objects similar in spirit to 'ss' - one minor change to the kobject code acked by Greg KH" * tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (259 commits) RDMA/nldev: Provide detailed QP information RDMA/nldev: Provide global resource utilization RDMA/core: Add resource tracking for create and destroy PDs RDMA/core: Add resource tracking for create and destroy CQs RDMA/core: Add resource tracking for create and destroy QPs RDMA/restrack: Add general infrastructure to track RDMA resources RDMA/core: Save kernel caller name when creating PD and CQ objects RDMA/core: Use the MODNAME instead of the function name for pd callers RDMA: Move enum ib_cq_creation_flags to uapi headers IB/rxe: Change RDMA_RXE kconfig to use select IB/qib: remove qib_keys.c IB/mthca: remove mthca_user.h RDMA/cm: Fix access to uninitialized variable RDMA/cma: Use existing netif_is_bond_master function IB/core: Avoid SGID attributes query while converting GID from OPA to IB RDMA/mlx5: Avoid memory leak in case of XRCD dealloc failure IB/umad: Fix use of unprotected device pointer IB/iser: Combine substrings for three messages IB/iser: Delete an unnecessary variable initialisation in iser_send_data_out() IB/iser: Delete an error message for a failed memory allocation in iser_send_data_out() ...
| * Merge tag v4.15 of ↵Jason Gunthorpe2018-01-302113-13477/+25692
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git To resolve conflicts in: drivers/infiniband/hw/mlx5/main.c drivers/infiniband/hw/mlx5/qp.c From patches merged into the -rc cycle. The conflict resolution matches what linux-next has been carrying. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
| * | RDMA/nldev: Provide detailed QP informationLeon Romanovsky2018-01-302-0/+269
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Implement RDMA nldev netlink interface to get detailed information on each QP in the system. This includes the owning process or kernel ULP and detailed information from the qp_attrs. Currently only the dumpit variant is implemented. Reviewed-by: Mark Bloch <markb@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
| * | RDMA/nldev: Provide global resource utilizationLeon Romanovsky2018-01-302-0/+154
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Expose through the netlink interface the global per-device utilization of the supported object types. Provide both dumpit and doit callbacks. As an example of possible output from rdmatool for system with 5 mlx5 cards: $ rdma res 1: mlx5_0: qp 4 cq 5 pd 3 2: mlx5_1: qp 4 cq 5 pd 3 3: mlx5_2: qp 4 cq 5 pd 3 4: mlx5_3: qp 2 cq 3 pd 2 5: mlx5_4: qp 4 cq 5 pd 3 Reviewed-by: Mark Bloch <markb@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
| * | RDMA/core: Add resource tracking for create and destroy PDsLeon Romanovsky2018-01-302-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | Track create and destroy operations of PD objects. Reviewed-by: Mark Bloch <markb@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
| * | RDMA/core: Add resource tracking for create and destroy CQsLeon Romanovsky2018-01-304-0/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | Track create and destroy operations of CQ objects. Reviewed-by: Mark Bloch <markb@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
| * | RDMA/core: Add resource tracking for create and destroy QPsLeon Romanovsky2018-01-303-5/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | Track create and destroy operations of QP objects. Reviewed-by: Mark Bloch <markb@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
| * | RDMA/restrack: Add general infrastructure to track RDMA resourcesLeon Romanovsky2018-01-306-1/+346
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The RDMA subsystem has very strict set of objects to work with, but it completely lacks tracking facilities and has no visibility of resource utilization. The following patch adds such infrastructure to keep track of RDMA resources to help with debugging of user space applications. The primary user of this infrastructure is RDMA nldev netlink (following patches), to be exposed to userspace via rdmatool, but it is not limited too that. At this stage, the main three objects (PD, CQ and QP) are added, and more will be added later. Reviewed-by: Mark Bloch <markb@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
| * | RDMA/core: Save kernel caller name when creating PD and CQ objectsLeon Romanovsky2018-01-293-9/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The KBUILD_MODNAME variable contains the module name and it is known for kernel users during compilation, so let's reuse it to track the owners. Followup patches will store this for resource tracking. Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
| * | RDMA/core: Use the MODNAME instead of the function name for pd callersLeon Romanovsky2018-01-291-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Each of our modules only allocates a PD in one place, so there isn't any loss in detail, while MODNAME is more useful and recognizable as something to expose to the user. Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
| * | RDMA: Move enum ib_cq_creation_flags to uapi headersJason Gunthorpe2018-01-295-11/+11
| | | | | | | | | | | | | | | | | | | | | | | | The flags field the enum is used with comes directly from the uapi so it belongs in the uapi headers for clarity and so userspace can use it. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
| * | IB/rxe: Change RDMA_RXE kconfig to use selectJason Gunthorpe2018-01-291-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | NET_UDP_TUNNEL is not user selectable, so it should be used as a select in kconfig. CRYPTO_CRC32 is a required library for RDMA_RXE so it should active automatically, as most other CRYPTO_ users do. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
| * | IB/qib: remove qib_keys.cCorentin Labbe2018-01-281-235/+0
| | | | | | | | | | | | | | | | | | | | | | | | qib_keys.c was left uncompilable in commit 7c2e11fe2dbe ("IB/qib: Remove qp and mr functionality from qib") Since nothing need it, remove it from tree. Signed-off-by: Corentin Labbe <clabbe@baylibre.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
| * | IB/mthca: remove mthca_user.hCorentin Labbe2018-01-281-112/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | mthca_user.h is unused since commit 486f60954c71 ("IB/mthca: Move user vendor structures") Remove it from tree. Signed-off-by: Corentin Labbe <clabbe@baylibre.com> Reviewed-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
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