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* NFSv4: Don't try to recover NFSv4 locks when they are lost.NeilBrown2013-09-041-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When an NFSv4 client loses contact with the server it can lose any locks that it holds. Currently when it reconnects to the server it simply tries to reclaim those locks. This might succeed even though some other client has held and released a lock in the mean time. So the first client might think the file is unchanged, but it isn't. This isn't good. If, when recovery happens, the locks cannot be claimed because some other client still holds the lock, then we get a message in the kernel logs, but the client can still write. So two clients can both think they have a lock and can both write at the same time. This is equally not good. There was a patch a while ago http://comments.gmane.org/gmane.linux.nfs/41917 which tried to address some of this, but it didn't seem to go anywhere. That patch would also send a signal to the process. That might be useful but for now this patch just causes writes to fail. For NFSv4 (unlike v2/v3) there is a strong link between the lock and the write request so we can fairly easily fail any IO of the lock is gone. While some applications might not expect this, it is still safer than allowing the write to succeed. Because this is a fairly big change in behaviour a module parameter, "recover_locks", is introduced which defaults to true (the current behaviour) but can be set to "false" to tell the client not to try to recover things that were lost. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Don't accept more reads/writes if the open context recovery failedTrond Myklebust2013-03-251-0/+2
| | | | | | | If the state recovery failed, we want to ensure that the application doesn't try to use the same file descriptor for more reads or writes. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Ensure that we free the rpc_task after read and write cleanups are doneTrond Myklebust2013-01-041-3/+7
| | | | | | | | | | | | This patch ensures that we free the rpc_task after the cleanup callbacks are done in order to avoid a deadlock problem that can be triggered if the callback needs to wait for another workqueue item to complete. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Weston Andros Adamson <dros@netapp.com> Cc: Tejun Heo <tj@kernel.org> Cc: Bruce Fields <bfields@fieldses.org> Cc: stable@vger.kernel.org [>= 3.5]
* Merge branch 'akpm' (Andrew's patch-bomb)Linus Torvalds2012-08-011-3/+3
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge Andrew's second set of patches: - MM - a few random fixes - a couple of RTC leftovers * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (120 commits) rtc/rtc-88pm80x: remove unneed devm_kfree rtc/rtc-88pm80x: assign ret only when rtc_register_driver fails mm: hugetlbfs: close race during teardown of hugetlbfs shared page tables tmpfs: distribute interleave better across nodes mm: remove redundant initialization mm: warn if pg_data_t isn't initialized with zero mips: zero out pg_data_t when it's allocated memcg: gix memory accounting scalability in shrink_page_list mm/sparse: remove index_init_lock mm/sparse: more checks on mem_section number mm/sparse: optimize sparse_index_alloc memcg: add mem_cgroup_from_css() helper memcg: further prevent OOM with too many dirty pages memcg: prevent OOM with too many dirty pages mm: mmu_notifier: fix freed page still mapped in secondary MMU mm: memcg: only check anon swapin page charges for swap cache mm: memcg: only check swap cache pages for repeated charging mm: memcg: split swapin charge function into private and public part mm: memcg: remove needless !mm fixup to init_mm when charging mm: memcg: remove unneeded shmem charge type ...
| * nfs: teach the NFS client how to treat PG_swapcache pagesMel Gorman2012-08-011-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Replace all relevant occurences of page->index and page->mapping in the NFS client with the new page_file_index() and page_file_mapping() functions. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Mel Gorman <mgorman@suse.de> Acked-by: Rik van Riel <riel@redhat.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: David S. Miller <davem@davemloft.net> Cc: Eric B Munson <emunson@mgebm.net> Cc: Eric Paris <eparis@redhat.com> Cc: James Morris <jmorris@namei.org> Cc: Mel Gorman <mgorman@suse.de> Cc: Mike Christie <michaelc@cs.wisc.edu> Cc: Neil Brown <neilb@suse.de> Cc: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Xiaotian Feng <dfeng@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | NFS: Convert v4 into a moduleBryan Schumaker2012-07-311-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | This patch exports symbols needed by the v4 module. In addition, I also switch over to using IS_ENABLED() to check if CONFIG_NFS_V4 or CONFIG_NFS_V4_MODULE are set. The module (nfs4.ko) will be created in the same directory as nfs.ko and will be automatically loaded the first time you try to mount over NFS v4. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: Convert v2 into a moduleBryan Schumaker2012-07-311-0/+1
|/ | | | | | | | The module (nfs2.ko) will be created in the same directory as nfs.ko and will be automatically loaded the first time you try to mount over NFS v2. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Create an read_pageio_init() functionBryan Schumaker2012-06-291-13/+3
| | | | | | | | | pNFS needs to select a read function based on the layout driver currently in use, so I let each NFS version decide how to best handle initializing reads. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4.1 add nfs_inode book keeping for mdsthresholdAndy Adamson2012-05-241-0/+2
| | | | | | | | Keep track of the number of bytes read or written via buffered, direct, and mem-mapped i/o for use by mdsthreshold size_io hints. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4.1 set RPC_TASK_SOFTCONN for filelayout DS RPC callsAndy Adamson2012-05-191-3/+3
| | | | | | | | RPC_TASK_SOFTCONN returns connection errors to the caller which allows the pNFS file layout to quickly try the MDS or perhaps another DS. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Fix sparse warningsTrond Myklebust2012-05-041-1/+1
| | | | | | | | | | | | | | | | Fix the following sparse warnings: fs/nfs/direct.c:221:6: warning: symbol 'nfs_direct_readpage_release' was not declared. Should it be static? fs/nfs/read.c:38:43: warning: non-ANSI function declaration of function 'nfs_readhdr_alloc' fs/nfs/objlayout/objio_osd.c:214:5: warning: symbol '__alloc_objio_seg' was not declared. Should it be static? Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Fred Isaman <iisaman@netapp.com> Cc: Boaz Harrosh <bharrosh@panasas.com>
* NFS: Simplify the nfs_read_completion functionsTrond Myklebust2012-05-011-26/+18
| | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Fred Isaman <iisaman@netapp.com>
* NFS: Clean up nfs read and write error pathsTrond Myklebust2012-05-011-17/+21
| | | | | | | | Move the error handling for nfs_generic_pagein() into a single function. Ditto for nfs_generic_flush(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Fred Isaman <iisaman@netapp.com>
* NFS: Read cleanupsTrond Myklebust2012-05-011-9/+4
| | | | | | | Remove unused variables, and reformat some code. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Fred Isaman <iisaman@netapp.com>
* NFS: rewrite directio read to use async coalesce codeFred Isaman2012-04-271-5/+5
| | | | | | | This also has the advantage that it allows directio to use pnfs. Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: create completion structure to pass into page_init functionsFred Isaman2012-04-271-14/+22
| | | | | | | | | Factors out the code that will need to change when directio starts using these code paths. This will allow directio to use the generic pagein and flush routines Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: merge _full and _partial read rpc_opsFred Isaman2012-04-271-181/+157
| | | | | | | | | | | | | | | | | Decouple nfs_pgio_header and nfs_read_data, and have (possibly multiple) nfs_read_datas each take a refcount on nfs_pgio_header. For the moment keeps nfs_read_header as a way to preallocate a single nfs_read_data with the nfs_pgio_header. The code doesn't need this, and would be prettier without, but given the amount of churn I am already introducing I didn't want to play with tuning new mempools. This also fixes bug in pnfs_ld_handle_read_error. In the case of desc->pg_bsize < PAGE_CACHE_SIZE, the pages list was empty, causing replay attempt to do nothing. Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: create struct nfs_page_arrayFred Isaman2012-04-271-14/+8
| | | | | | | | Both nfs_read_data and nfs_write_data devote several fields which can be combined into a single shared struct. Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: create common nfs_pgio_header for both read and writeFred Isaman2012-04-271-38/+51
| | | | | | | | | | | | | | | | | In order to avoid duplicating all the data in nfs_read_data whenever we split it up into multiple RPC calls (either due to a short read result or due to rsize < PAGE_SIZE), we split out the bits that are the same per RPC call into a separate "header" structure. The goal this patch moves towards is to have a single header refcounted by several rpc_data structures. Thus, want to always refer from rpc_data to the header, and not the other way. This patch comes close to that ideal, but the directio code currently needs some special casing, isolated in the nfs_direct_[read_write]hdr_release() functions. This will be dealt with in a future patch. Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: reverse arg order in nfs_initiate_[read|write]Fred Isaman2012-04-271-2/+3
| | | | | | | Make it consistent with nfs_initiate_commit. Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: put open context on error in nfs_pagein_multiFred Isaman2012-04-201-1/+1
| | | | | | Cc: <stable@vger.kernel.org> Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* Merge tag 'split-asm_system_h-for-linus-20120328' of ↵Linus Torvalds2012-03-291-1/+0
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system Pull "Disintegrate and delete asm/system.h" from David Howells: "Here are a bunch of patches to disintegrate asm/system.h into a set of separate bits to relieve the problem of circular inclusion dependencies. I've built all the working defconfigs from all the arches that I can and made sure that they don't break. The reason for these patches is that I recently encountered a circular dependency problem that came about when I produced some patches to optimise get_order() by rewriting it to use ilog2(). This uses bitops - and on the SH arch asm/bitops.h drags in asm-generic/get_order.h by a circuituous route involving asm/system.h. The main difficulty seems to be asm/system.h. It holds a number of low level bits with no/few dependencies that are commonly used (eg. memory barriers) and a number of bits with more dependencies that aren't used in many places (eg. switch_to()). These patches break asm/system.h up into the following core pieces: (1) asm/barrier.h Move memory barriers here. This already done for MIPS and Alpha. (2) asm/switch_to.h Move switch_to() and related stuff here. (3) asm/exec.h Move arch_align_stack() here. Other process execution related bits could perhaps go here from asm/processor.h. (4) asm/cmpxchg.h Move xchg() and cmpxchg() here as they're full word atomic ops and frequently used by atomic_xchg() and atomic_cmpxchg(). (5) asm/bug.h Move die() and related bits. (6) asm/auxvec.h Move AT_VECTOR_SIZE_ARCH here. Other arch headers are created as needed on a per-arch basis." Fixed up some conflicts from other header file cleanups and moving code around that has happened in the meantime, so David's testing is somewhat weakened by that. We'll find out anything that got broken and fix it.. * tag 'split-asm_system_h-for-linus-20120328' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-asm_system: (38 commits) Delete all instances of asm/system.h Remove all #inclusions of asm/system.h Add #includes needed to permit the removal of asm/system.h Move all declarations of free_initmem() to linux/mm.h Disintegrate asm/system.h for OpenRISC Split arch_align_stack() out from asm-generic/system.h Split the switch_to() wrapper out of asm-generic/system.h Move the asm-generic/system.h xchg() implementation to asm-generic/cmpxchg.h Create asm-generic/barrier.h Make asm-generic/cmpxchg.h #include asm-generic/cmpxchg-local.h Disintegrate asm/system.h for Xtensa Disintegrate asm/system.h for Unicore32 [based on ver #3, changed by gxt] Disintegrate asm/system.h for Tile Disintegrate asm/system.h for Sparc Disintegrate asm/system.h for SH Disintegrate asm/system.h for Score Disintegrate asm/system.h for S390 Disintegrate asm/system.h for PowerPC Disintegrate asm/system.h for PA-RISC Disintegrate asm/system.h for MN10300 ...
| * Remove all #inclusions of asm/system.hDavid Howells2012-03-281-1/+0
| | | | | | | | | | | | | | | | | | Remove all #inclusions of asm/system.h preparatory to splitting and killing it. Performed with the following command: perl -p -i -e 's!^#\s*include\s*<asm/system[.]h>.*\n!!' `grep -Irl '^#\s*include\s*<asm/system[.]h>' *` Signed-off-by: David Howells <dhowells@redhat.com>
* | NFS: Remove nfs4_setup_sequence from generic read codeBryan Schumaker2012-03-211-12/+1
| | | | | | | | | | | | | | | | This is an NFS v4 specific operation, so it belongs in the NFS v4 code and not the generic client. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFSv4.1: Clean ups and bugfixes for the pNFS read/writeback/commit codeTrond Myklebust2012-03-171-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move more pnfs-isms out of the generic commit code. Bugfixes: - filelayout_scan_commit_lists doesn't need to get/put the lseg. In fact since it is run under the inode->i_lock, the lseg_put() can deadlock. - Ensure that we distinguish between what needs to be done for commit-to-data server and what needs to be done for commit-to-MDS using the new flag PG_COMMIT_TO_DS. Otherwise we may end up calling put_lseg() on a bucket for a struct nfs_page that got written through the MDS. - Fix a case where we were using list_del() on an nfs_page->wb_list instead of list_del_init(). - filelayout_initiate_commit needs to call filelayout_commit_release on error instead of the mds_ops->rpc_release(). Otherwise it won't clear the commit lock. Cleanups: - Let the files layout manage the commit lists for the pNFS case. Don't expose stuff like pnfs_choose_commit_list, and the fact that the commit buckets hold references to the layout segment in common code. - Cast out the put_lseg() calls for the struct nfs_read/write_data->lseg into the pNFS layer from whence they came. - Let the pNFS layer manage the NFS_INO_PNFS_COMMIT bit. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Fred Isaman <iisaman@netapp.com>
* | NFSv41: Add a new helper nfs4_init_sequence()Trond Myklebust2012-02-011-1/+1
|/ | | | | | Clean up Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Revert pnfs ugliness from the generic NFS read code pathTrond Myklebust2011-11-101-12/+2
| | | | | | | pNFS-specific code belongs in the pnfs layer. It should not be hijacking generic NFS read or write code paths. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Get rid of the nfs_rdata_mempoolTrond Myklebust2011-10-191-13/+4
| | | | | | We don't need a mempool in order to guarantee reliable NFS read performance. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Don't rely on PageError in nfs_readpage_release_partialTrond Myklebust2011-10-191-5/+2
| | | | | | | | | | | Don't rely on the PageError flag to tell us if one of the partial reads of the page failed. Instead, replace that with a dedicated flag in the struct nfs_page. Then clean out redundant uses of the PageError flag: the VM no longer checks it for reads. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Get rid of unnecessary calls to ClearPageError() in read codeTrond Myklebust2011-10-191-2/+0
| | | | | | The generic file read code does that for us anyway. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Get rid of nfs_restart_rpc()Trond Myklebust2011-10-191-1/+1
| | | | | | It can trivially be replaced with rpc_restart_call_prepare. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* pnfs: recoalesce when ld read pagelist failsPeng Tao2011-10-181-1/+11
| | | | | | | | | | For pnfs pagelist read failure, we need to pg_recoalesce and resend IO to mds. Signed-off-by: Peng Tao <peng_tao@emc.com> Signed-off-by: Jim Rees <rees@umich.edu> Cc: stable@kernel.org [3.0] Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* Merge branch 'master' into devel and apply fixup from Stephen Rothwell:Stephen Rothwell2011-07-251-5/+5
|\ | | | | | | | | | | | | vfs/nfs: fixup for nfs_open_context change Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * nfs_open_context doesn't need struct path eitherAl Viro2011-07-201-4/+4
| | | | | | | | | | | | just dentry, please... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | NFS: Clean up - simplify the switch to read/write-through-MDSTrond Myklebust2011-07-151-2/+2
| | | | | | | | | | | | | | Use nfs_pageio_reset_read_mds and nfs_pageio_reset_write_mds instead of completely reinitialising the struct nfs_pageio_descriptor. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: Move the pnfs read code into pnfs.cTrond Myklebust2011-07-151-26/+20
| | | | | | | | | | | | | | ...and ensure that we recoalese to take into account differences in block sizes when falling back to read through the MDS. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: Use the nfs_pageio_descriptor->pg_bsize in the read/write requestTrond Myklebust2011-07-151-1/+1
| | | | | | | | | | | | | | | | Instead of looking up the rsize and wsize, the routines that generate the RPC requests should really be using the pg_bsize, since that is what we use when deciding whether or not to coalesce write requests... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: Cache rpc_ops in struct nfs_pageio_descriptorTrond Myklebust2011-07-151-11/+8
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: Clean up: split out the RPC transmission from nfs_pagein_multi/oneTrond Myklebust2011-07-151-42/+50
| | | | | | | | | | | | ...and do the same for nfs_flush_multi/one. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: fix return value of nfs_pagein_one/nfs_flush_onePeng Tao2011-07-151-1/+2
| | | | | | | | | | Signed-off-by: Peng Tao <peng_tao@emc.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: Clean up nfs_read_rpcsetup and nfs_write_rpcsetupTrond Myklebust2011-07-121-17/+25
| | | | | | | | | | | | | | Split them up into two parts: one which sets up the struct nfs_read/write_data, the other which sets up the actual RPC call or pNFS call. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFSv4.1: File layout only supports whole file layoutsAndy Adamson2011-07-121-0/+1
| | | | | | | | | | | | | | | | | | Ask for whole file layouts. Until support for layout segments is fully supported in the file layout code, discard non-whole file layouts. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFSv4.1: Fall back to ordinary i/o through the mds if we have no layout segmentTrond Myklebust2011-07-121-1/+1
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFSv4.1: Add an initialisation callback for pNFSTrond Myklebust2011-07-121-12/+4
| | | | | | | | | | | | Ensure that we always get a layout before setting up the i/o request. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: Cleanup of the nfs_pageio code in preparation for a pnfs bugfixTrond Myklebust2011-07-121-11/+32
|/ | | | | | | | | | | | We need to ensure that the layouts are set up before we can decide to coalesce requests. To do so, we want to further split up the struct nfs_pageio_descriptor operations into an initialisation callback, a coalescing test callback, and a 'do i/o' callback. This patch cleans up the existing callback methods before adding the 'initialisation' callback. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4.1: unify pnfs_pageio_init functionsBenny Halevy2011-05-291-1/+0
| | | | | | | | | | | | Use common code for pnfs_pageio_init_{read,write} and use a common generic pg_test function. Note that this function always assumes the the layout driver's pg_test method is implemented. [Fix BUG] Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com>
* pnfs: Use byte-range for layoutgetBenny Halevy2011-05-291-2/+6
| | | | | | | | | | | | | | | | | | | | Add offset and count parameters to pnfs_update_layout and use them to get the layout in the pageio path. Order cache layout segments in the following order: * offset (ascending) * length (descending) * iomode (RW before READ) Test byte range against the layout segment in use in pnfs_{read,write}_pg_test so not to coalesce pages not using the same layout segment. [fix lseg ordering] [clean up pnfs_find_lseg lseg arg] [remove unnecessary FIXME] [fix ordering in pnfs_insert_layout] [clean up pnfs_insert_layout] Signed-off-by: Benny Halevy <bhalevy@panasas.com>
* NFSv4.1: Ensure that layoutget uses the correct gfp modesTrond Myklebust2011-05-121-2/+2
| | | | | | | Currently, writebacks may end up recursing back into the filesystem due to GFP_KERNEL direct reclaims in the pnfs subsystem. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs: BKL is no longer needed, so remove the includeStephen Rothwell2011-03-151-1/+0
| | | | | Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4.1: Clear lseg pointer in ->doio functionFred Isaman2011-03-111-0/+2
| | | | | | | | Now that we have access to the pointer, clear it immediately after the put, instead of in caller. Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 08:46:58 +0100