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* Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds2008-07-1447-564/+2741
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://git.kernel.dk/linux-2.6-block: (37 commits) splice: fix generic_file_splice_read() race with page invalidation ramfs: enable splice write drivers/block/pktcdvd.c: avoid useless memset cdrom: revert commit 22a9189 (cdrom: use kmalloced buffers instead of buffers on stack) scsi: sr avoids useless buffer allocation block: blk_rq_map_kern uses the bounce buffers for stack buffers block: add blk_queue_update_dma_pad DAC960: push down BKL pktcdvd: push BKL down into driver paride: push ioctl down into driver block: use get_unaligned_* helpers block: extend queue_flag bitops block: request_module(): use format string Add bvec_merge_data to handle stacked devices and ->merge_bvec() block: integrity flags can't use bit ops on unsigned short cmdfilter: extend default read filter sg: fix odd style (extra parenthesis) introduced by cmd filter patch block: add bounce support to blk_rq_map_user_iov cfq-iosched: get rid of enable_idle being unused warning allow userspace to modify scsi command filter on per device basis ...
| * splice: fix generic_file_splice_read() race with page invalidationMiklos Szeredi2008-07-041-4/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If a page was invalidated during splicing from file to a pipe, then generic_file_splice_read() could return a short or zero count. This manifested itself in rare I/O errors seen on nfs exported fuse filesystems. This is because nfsd uses splice_direct_to_actor() to read files, and fuse uses invalidate_inode_pages2() to invalidate stale data on open. Fix by redoing the page find/create if it was found to be truncated (invalidated). Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * ramfs: enable splice writeOctavian Purdila2008-07-042-0/+2
| | | | | | | | | | | | Signed-off-by: Octavian Purdila <opurdila@ixiacom.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * drivers/block/pktcdvd.c: avoid useless memsetChristophe Jaillet2008-07-041-2/+0
| | | | | | | | | | | | | | | | | | | | Avoid the 'memset(...,0, ...)' before calling 'init_cdrom_command' because this function already does it. Signed-off-by: Christophe Jaillet <jaillet.christophe@wanadoo.fr> Acked-by: Peter Osterlund <petero2@telia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * cdrom: revert commit 22a9189 (cdrom: use kmalloced buffers instead of ↵FUJITA Tomonori2008-07-041-181/+93
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | buffers on stack) The commit 22a9189fd073db3d03a4cf8b8c098aa207602de1 (cdrom: use kmalloced buffers instead of buffers on stack) is introduced to use kmalloced buffers for packet commands to avoid stack corruption on non coherent platforms. SCSI cdrom uses blk_rq_map_kern, which properly avoids DMA on the stack by using the bounce buffers. IDE cdrom also has the mechnism to avoids DMA on the stack. So we don't need this extra complexitiy in cdrom.c, such as allocating just 8 bytes. The lower layers can handle it. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Tejun Heo <htejun@gmail.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * scsi: sr avoids useless buffer allocationFUJITA Tomonori2008-07-041-15/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | blk_rq_map_kern can handle the stack buffers correctly (avoid DMA from/to the stack buffers by using the bounce buffer) so we don't need to complicate the code by allocating just 8 bytes. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Tejun Heo <htejun@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * block: blk_rq_map_kern uses the bounce buffers for stack buffersFUJITA Tomonori2008-07-041-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | blk_rq_map_kern is used for kernel internal I/Os. Some callers use this function with stack buffers but DMA to/from the stack buffers leads to memory corruption on a non-coherent platform. This patch make blk_rq_map_kern uses the bounce buffers if a caller passes a stack buffer (on the all platforms for simplicity). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Tejun Heo <htejun@gmail.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * block: add blk_queue_update_dma_padFUJITA Tomonori2008-07-043-5/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds blk_queue_update_dma_pad to prevent LLDs from overwriting the dma pad mask wrongly (we added blk_queue_update_dma_alignment due to the same reason). This also converts libata to use blk_queue_update_dma_pad instead of blk_queue_dma_pad. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Tejun Heo <htejun@gmail.com> Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * DAC960: push down BKLAlan Cox2008-07-041-56/+101
| | | | | | | | | | | | | | Signed-off-by: Alan Cox <alan@redhat.com> Cc: Richard Knutsson <ricknu-0@student.ltu.se> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * pktcdvd: push BKL down into driverAlan Cox2008-07-041-10/+25
| | | | | | | | | | | | | | | | | | | | Push the lock_kernel down into the driver and switch to unlocked_ioctl [akpm@linux-foundation.org: build fix] Signed-off-by: Alan Cox <alan@redhat.com> Acked-by: Peter Osterlund <petero2@telia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * paride: push ioctl down into driverAlan Cox2008-07-041-9/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | Leaves us with lock_kernel for two methods. Also remove a bogus printk with no printk level and return -ENOTTY not -EINVAL for correctness. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> (Jens: added smp_lock.h include to pt.c, otherwise it wont compile because of missing {un}lock_kernel() definition) Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * block: use get_unaligned_* helpersHarvey Harrison2008-07-041-1/+1
| | | | | | | | | | | | Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * block: extend queue_flag bitopsJens Axboe2008-07-032-8/+30
| | | | | | | | | | | | Add test_and_clear and test_and_set. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * block: request_module(): use format stringmaximilian attems2008-07-031-1/+1
| | | | | | | | | | | | | | | | Avoid bad things happening if the module has a printk control string in its name. Signed-off-by: maximilian attems <max@stro.at> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * Add bvec_merge_data to handle stacked devices and ->merge_bvec()Alasdair G Kergon2008-07-037-29/+60
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When devices are stacked, one device's merge_bvec_fn may need to perform the mapping and then call one or more functions for its underlying devices. The following bio fields are used: bio->bi_sector bio->bi_bdev bio->bi_size bio->bi_rw using bio_data_dir() This patch creates a new struct bvec_merge_data holding a copy of those fields to avoid having to change them directly in the struct bio when going down the stack only to have to change them back again on the way back up. (And then when the bio gets mapped for real, the whole exercise gets repeated, but that's a problem for another day...) Signed-off-by: Alasdair G Kergon <agk@redhat.com> Cc: Neil Brown <neilb@suse.de> Cc: Milan Broz <mbroz@redhat.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * block: integrity flags can't use bit ops on unsigned shortJens Axboe2008-07-032-14/+11
| | | | | | | | | | | | | | Just use normal open coded bit operations instead, they need not be atomic. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * cmdfilter: extend default read filterAdel Gadllah2008-07-032-4/+9
| | | | | | | | | | | | | | | | This patch adds the commands that the former sg filter allowed for read access to the cmdfilter to keep userspace apps that rely on them working. Signed-off-by: Adel Gadllah <adel.gadllah@gmail.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * sg: fix odd style (extra parenthesis) introduced by cmd filter patchJens Axboe2008-07-031-1/+1
| | | | | | | | Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * block: add bounce support to blk_rq_map_user_iovFUJITA Tomonori2008-07-031-0/+1
| | | | | | | | | | | | | | | | | | | | | | blk_rq_map_user_iov can't handle the bounce buffer (it means that the bio_map_user_iov path doesn't work with a LLD that needs GFP_DMA). This patch fixes blk_rq_map_user_iov to support the bounce buffer. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * cfq-iosched: get rid of enable_idle being unused warningJens Axboe2008-07-031-1/+1
| | | | | | | | Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * allow userspace to modify scsi command filter on per device basisAdel Gadllah2008-07-038-159/+389
| | | | | | | | | | | | | | | | | | | | | | | | This patch exports the per-gendisk command filter to user space through sysfs, so it can be changed by the system administrator. All users of the old cmd filter have been converted to use the new one. Original patch from Peter Jones. Signed-off-by: Adel Gadllah <adel.gadllah@gmail.com> Signed-off-by: Peter Jones <pjones@redhat.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * block: integrity cleanupsJens Axboe2008-07-032-5/+8
| | | | | | | | | | | | | | - No need to check for NULL bio, we'll get an immediate oops anyway. - Make bio_integrity() a proper function. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * block: blkdev.h cleanup, move iocontext stuff to iocontext.hJens Axboe2008-07-034-17/+20
| | | | | | | | Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * block: integrity checkpatch cleanupsJens Axboe2008-07-032-12/+25
| | | | | | | | | | | | > 80 char lines and that sort of thing. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * block: Data integrity infrastructure documentationMartin K. Petersen2008-07-032-0/+361
| | | | | | | | | | Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * block: Block layer data integrity supportMartin K. Petersen2008-07-0313-7/+1355
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some block devices support verifying the integrity of requests by way of checksums or other protection information that is submitted along with the I/O. This patch implements support for generating and verifying integrity metadata, as well as correctly merging, splitting and cloning bios and requests that have this extra information attached. See Documentation/block/data-integrity.txt for more information. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * block: Globalize bio_set and bio_vec_slabMartin K. Petersen2008-07-032-28/+31
| | | | | | | | | | | | | | | | | | Move struct bio_set and biovec_slab definitions to bio.h so they can be used outside of bio.c. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * xen: Avoid allocations causing swap activity on the resume pathIan Campbell2008-07-034-10/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Avoid allocations causing swap activity on the resume path by preventing the allocations from doing IO and allowing them to access the emergency pools. These paths are used when a frontend device is trying to connect to its backend driver over Xenbus. These reconnections are triggered on demand by IO, so by definition there is already IO underway, and further IO would naturally deadlock. On resume, this path is triggered when the running system tries to continue using its devices. If it cannot then the resume will fail; to try to avoid this we let it dip into the emergency pools. [ linux-2.6.18-xen changesets e8b49cfbdac, fdb998e79aba ] Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * xen/blkfront: add __exit to module_exit() handlersJan Beulich2008-07-031-1/+1
| | | | | | | | | | | | Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * xen/blkfront: Make sure that the device is fully ready before allowing release.Wim Colgate2008-07-031-1/+1
| | | | | | | | | | | | | | | | [ linux-2.6.18-xen changeset c1c57fea77e9 ] Signed-off-by: Wim Colgate <wim@xensource.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * xen/blkfront: Add the CDROM_GET_CAPABILITY ioctl to blkfront.Christian Limpach2008-07-031-0/+36
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Return 0 instead of -EINVAL if the blkfront device is a cdrom, i.e. had the VDISK_CDROM attribute. This allows udev's cdrom_id to correctly detect the device as a cdrom device. [ Add blkif_ioctl, and CDROMMULTISESSION ] [ linux-2.6.18-xen changeset d2bd9af846b5 ] Signed-off-by: Christian Limpach <Christian.Limpach@xensource.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * xen/blkfront: Make sure we don't use bounce buffers, we don't need them.Ian Campbell2008-07-031-0/+3
| | | | | | | | | | | | | | | | [ linux-2.6.18-xen changeset 667228bf8fc5 ] Signed-off-by: Ian Campbell <ian.campbell@xensource.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * block: kill request_queue_tJens Axboe2008-07-031-1/+0
| | | | | | | | | | | | | | | | Everything was moved to struct request_queue a few kernel revisions ago, maintaining the deprecated typedef to avoid breaking things. Now the time has come to get rid of that typedef. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * block: export "ro" attributeKay Sievers2008-07-031-0/+10
| | | | | | | | | | Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * Added in user-injected messages into blk tracesAlan D. Brunelle2008-07-032-0/+46
| | | | | | | | | | | | | | | | | | This allows a user to annotate the blk trace stream: writing a suitable message to {/sys/kernel/debug}/block/<dsf>/msg will have it propagated into the trace stream. Signed-off-by: Alan D. Brunelle <alan.brunelle@hp.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * cfq-iosched: add message logging through blktraceJens Axboe2008-07-031-10/+55
| | | | | | | | | | | | | | Now that blktrace has the ability to carry arbitrary messages in its stream, use that for some CFQ logging. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * as-iosched: properly protect ioc_gone and ioc countJens Axboe2008-07-031-3/+15
| | | | | | | | | | | | | | | | | | | | | | If we have multiple tasks freeing io contexts when as-iosched is being unloaded, we could complete() ioc_gone twice. Fix that by protecting ioc_gone complete() and clearing with a spinlock for just that purpose. Doesn't matter from a performance perspective, since it'll only enter that path when ioc_gone != NULL (when as-iosched is being rmmod'ed). Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * cfq-iosched: properly protect ioc_gone and ioc countJens Axboe2008-07-031-3/+15
| | | | | | | | | | | | | | | | | | | | | | If we have multiple tasks freeing cfq_io_contexts when cfq-iosched is being unloaded, we could complete() ioc_gone twice. Fix that by protecting ioc_gone complete() and clearing with a spinlock for just that purpose. Doesn't matter from a performance perspective, since it'll only enter that path when ioc_gone != NULL (when cfq-iosched is being rmmod'ed). Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* | Start using the new '%pS' infrastructure to print symbolsLinus Torvalds2008-07-142-27/+3
| | | | | | | | | | | | | | This simplifies the code significantly, and was the whole point of the exercise. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Linux 2.6.26v2.6.26Linus Torvalds2008-07-131-1/+1
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* | devcgroup: fix permission check when adding entry to child cgroupLi Zefan2008-07-131-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | # cat devices.list c 1:3 r # echo 'c 1:3 w' > sub/devices.allow # cat sub/devices.list c 1:3 w As illustrated, the parent group has no write permission to /dev/null, so it's child should not be allowed to add this write permission. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Acked-by: Serge Hallyn <serue@us.ibm.com> Cc: Serge Hallyn <serue@us.ibm.com> Cc: Paul Menage <menage@google.com> Cc: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | devcgroup: always show positive major/minor numLi Zefan2008-07-131-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | # echo "b $((0x7fffffff)):$((0x80000000)) rwm" > devices.allow # cat devices.list b 214748364:-21474836 rwm though a major/minor number of 0x800000000 is meaningless, we should not cast it to a negative value. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Acked-by: Serge Hallyn <serue@us.ibm.com> Cc: Serge Hallyn <serue@us.ibm.com> Cc: Paul Menage <menage@google.com> Cc: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Documentation/HOWTO: correct wrong kernel bugzilla FAQ URLJiri Pirko2008-07-131-1/+1
| | | | | | | | | | | | | | Signed-off-by: Jiri Pirko <jpirko@redhat.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge branch 'sched-fixes-for-linus' of ↵Linus Torvalds2008-07-131-6/+18
|\ \ | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: cpusets, hotplug, scheduler: fix scheduler domain breakage
| * | cpusets, hotplug, scheduler: fix scheduler domain breakageDmitry Adamushko2008-07-131-6/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit f18f982ab ("sched: CPU hotplug events must not destroy scheduler domains created by the cpusets") introduced a hotplug-related problem as described below: Upon CPU_DOWN_PREPARE, update_sched_domains() -> detach_destroy_domains(&cpu_online_map) does the following: /* * Force a reinitialization of the sched domains hierarchy. The domains * and groups cannot be updated in place without racing with the balancing * code, so we temporarily attach all running cpus to the NULL domain * which will prevent rebalancing while the sched domains are recalculated. */ The sched-domains should be rebuilt when a CPU_DOWN ops. has been completed, effectively either upon CPU_DEAD{_FROZEN} (upon success) or CPU_DOWN_FAILED{_FROZEN} (upon failure -- restore the things to their initial state). That's what update_sched_domains() also does but only for !CPUSETS case. With f18f982ab, sched-domains' reinitialization is delegated to CPUSETS code: cpuset_handle_cpuhp() -> common_cpu_mem_hotplug_unplug() -> rebuild_sched_domains() Being called for CPU_UP_PREPARE and if its callback is called after update_sched_domains()), it just negates all the work done by update_sched_domains() -- i.e. a soon-to-be-offline cpu is included in the sched-domains and that makes it visible for the load-balancer while the CPU_DOWN ops. is in progress. __migrate_live_tasks() moves the tasks off a 'dead' cpu (it's already "offline" when this function is called). try_to_wake_up() is called for one of these tasks from another CPU -> the load-balancer (wake_idle()) picks up a "dead" CPU and places the task on it. Then e.g. BUG_ON(rq->nr_running) detects this a bit later -> oops. Signed-off-by: Dmitry Adamushko <dmitry.adamushko@gmail.com> Tested-by: Vegard Nossum <vegard.nossum@gmail.com> Cc: Paul Menage <menage@google.com> Cc: Max Krasnyansky <maxk@qualcomm.com> Cc: Paul Jackson <pj@sgi.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: miaox@cn.fujitsu.com Cc: rostedt@goodmis.org Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds2008-07-121-2/+2
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: fix ldt limit for 64 bit
| * | | x86: fix ldt limit for 64 bitMichael Karcher2008-07-121-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix size of LDT entries. On x86-64, ldt_desc is a double-sized descriptor. Signed-off-by: Michael Karcher <kernel@mkarcher.dialup.fu-berlin.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6Linus Torvalds2008-07-125-7/+31
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6: [SCSI] bsg: fix oops on remove [SCSI] fusion: default MSI to disabled for SPI and FC controllers [SCSI] ipr: Fix HDIO_GET_IDENTITY oops for SATA devices [SCSI] mptspi: fix oops in mptspi_dv_renegotiate_work() [SCSI] erase invalid data returned by device
| * | | | [SCSI] bsg: fix oops on removeJames Bottomley2008-07-121-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If you do a modremove of any sas driver, you run into an oops on shutdown when the host is removed (coming from the host bsg device). The root cause seems to be that there's a use after free of the bsg_class_device: In bsg_kref_release_function, this is used (to do a put_device(bcg->parent) after bcg->release has been called. In sas (and possibly many other things) bcd->release frees the queue which contains the bsg_class_device, so we get a put_device on unreferenced memory. Fix this by taking a copy of the pointer to the parent before releasing bsg. Acked-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
| * | | | [SCSI] fusion: default MSI to disabled for SPI and FC controllersJames Bottomley2008-07-121-3/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There's a fault on the FC controllers that makes them not respond correctly to MSI. The SPI controllers are fine, but are likely to be onboard on older motherboards which don't handle MSI correctly, so default both these cases to disabled. Enable by setting the module parameter mpt_msi_enable=1. For the SAS case, enable MSI by default, but it can be disabled by setting the module parameter mpt_msi_enable=0. Cc: "Prakash, Sathya" <sathya.prakash@lsi.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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