AcoSail/kernel_optimize_test
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07a258531c
kernel_optimize_test/drivers/md
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Bart Van Assche 1c23484c35 dm mpath: do not lock up a CPU with requeuing activity 
When using the block layer in single queue mode, get_request()
returns ERR_PTR(-EAGAIN) if the queue is dying and the REQ_NOWAIT
flag has been passed to get_request(). Avoid that the kernel
reports soft lockup complaints in this case due to continuous
requeuing activity.

Fixes: 7083abbbf ("dm mpath: avoid that path removal can trigger an infinite loop")
Cc: stable@vger.kernel.org
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Tested-by: Laurence Oberman <loberman@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-08-28 09:58:27 -04:00
..
bcache Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-07-03 13:08:04 -07:00
persistent-data dm space map disk: fix some book keeping in the disk space map 2017-05-15 15:09:50 -04:00
bitmap.c md/bitmap: don't read page from device with Bitmap_sync 2017-07-10 10:30:41 -07:00
bitmap.h
dm-bio-prison-v1.c dm bio prison: use rb_entry() rather than container_of() 2017-06-19 11:03:50 -04:00
dm-bio-prison-v1.h block: switch bios to blk_status_t 2017-06-09 09:27:32 -06:00
dm-bio-prison-v2.c dm bio prison: use rb_entry() rather than container_of() 2017-06-19 11:03:50 -04:00
dm-bio-prison-v2.h
dm-bio-record.h
dm-bufio.c dm bufio: fix error code in dm_bufio_write_dirty_buffers() 2017-07-25 10:11:15 -04:00
dm-bufio.h
dm-builtin.c
dm-cache-background-tracker.c dm cache: handle kmalloc failure allocating background_tracker struct 2017-05-17 09:44:53 -04:00
dm-cache-background-tracker.h
dm-cache-block-types.h
dm-cache-metadata.c dm cache metadata: fail operations if fail_io mode has been established 2017-05-05 14:40:13 -04:00
dm-cache-metadata.h
dm-cache-policy-internal.h
dm-cache-policy-smq.c dm cache policy smq: don't do any writebacks unless IDLE 2017-05-14 21:54:33 -04:00
dm-cache-policy.c
dm-cache-policy.h
dm-cache-target.c block: switch bios to blk_status_t 2017-06-09 09:27:32 -06:00
dm-core.h dm: add basic support for using the select or poll function 2017-06-19 11:03:49 -04:00
dm-crypt.c dm crypt: add big-endian variant of plain64 IV 2017-06-19 11:03:50 -04:00
dm-delay.c dm: mark targets that pass integrity data 2017-04-24 12:04:32 -04:00
dm-era-target.c dm block manager: remove an unused argument from dm_block_manager_create() 2017-04-27 17:08:41 -04:00
dm-exception-store.c
dm-exception-store.h
dm-flakey.c dm flakey: add support for zoned block devices 2017-06-19 11:03:51 -04:00
dm-integrity.c dm integrity: test for corrupted disk format during table load 2017-07-25 10:11:14 -04:00
dm-io.c Merge branch 'for-4.13/block' of git://git.kernel.dk/linux-block 2017-07-03 10:34:51 -07:00
dm-ioctl.c dm ioctl: report event number in DM_LIST_DEVICES 2017-06-19 11:03:50 -04:00
dm-kcopyd.c dm kcopyd: add sequential write feature 2017-06-19 11:03:51 -04:00
dm-linear.c libnvdimm for 4.13 2017-07-07 09:44:06 -07:00
dm-log-userspace-base.c
dm-log-userspace-transfer.c
dm-log-userspace-transfer.h
dm-log-writes.c block: switch bios to blk_status_t 2017-06-09 09:27:32 -06:00
dm-log.c
dm-mpath.c dm mpath: do not lock up a CPU with requeuing activity 2017-08-28 09:58:27 -04:00
dm-mpath.h
dm-path-selector.c
dm-path-selector.h
dm-queue-length.c
dm-raid.c dm raid: bump target version 2017-07-25 14:54:20 -04:00
dm-raid1.c Merge branch 'for-4.13/block' of git://git.kernel.dk/linux-block 2017-07-03 10:34:51 -07:00
dm-region-hash.c
dm-round-robin.c
dm-rq.c blk-mq: use the introduced blk_mq_unquiesce_queue() 2017-06-18 14:20:04 -06:00
dm-rq.h block: introduce new block status code type 2017-06-09 09:27:32 -06:00
dm-service-time.c
dm-snap-persistent.c dm: make flush bios explicitly sync 2017-05-31 10:50:23 -04:00
dm-snap-transient.c
dm-snap.c block: switch bios to blk_status_t 2017-06-09 09:27:32 -06:00
dm-stats.c mm: introduce kv[mz]alloc helpers 2017-05-08 17:15:12 -07:00
dm-stats.h
dm-stripe.c libnvdimm for 4.13 2017-07-07 09:44:06 -07:00
dm-switch.c
dm-sysfs.c
dm-table.c dm, dax: Make sure dm_dax_flush() is called if device supports it 2017-07-26 15:55:44 -04:00
dm-target.c dm: don't return errnos from ->map 2017-06-09 09:27:32 -06:00
dm-thin-metadata.c dm thin metadata: call precommit before saving the roots 2017-05-15 15:09:49 -04:00
dm-thin-metadata.h
dm-thin.c Merge branch 'for-4.13/block' of git://git.kernel.dk/linux-block 2017-07-03 10:34:51 -07:00
dm-uevent.c
dm-uevent.h
dm-verity-fec.c dm verity fec: fix GFP flags used with mempool_alloc() 2017-07-26 15:55:44 -04:00
dm-verity-fec.h
dm-verity-target.c Linux 4.12-rc5 2017-06-12 08:30:13 -06:00
dm-verity.h dm verity: switch to using asynchronous hash crypto API 2017-04-24 15:37:04 -04:00
dm-zero.c dm: don't return errnos from ->map 2017-06-09 09:27:32 -06:00
dm-zoned-metadata.c dm zoned: use GFP_NOIO in I/O path 2017-07-26 15:55:43 -04:00
dm-zoned-reclaim.c dm zoned: use GFP_NOIO in I/O path 2017-07-26 15:55:43 -04:00
dm-zoned-target.c dm zoned: use GFP_NOIO in I/O path 2017-07-26 15:55:43 -04:00
dm-zoned.h dm zoned: drive-managed zoned block device target 2017-06-19 11:05:20 -04:00
dm.c dm: fix printk() rate limiting code 2017-08-28 09:58:27 -04:00
dm.h dm: introduce enum dm_queue_mode to cleanup related code 2017-04-27 17:08:44 -04:00
faulty.c md: fix deadlock between mddev_suspend() and md_write_start() 2017-06-13 10:18:01 -07:00
Kconfig dm zoned: drive-managed zoned block device target 2017-06-19 11:05:20 -04:00
linear.c md: fix deadlock between mddev_suspend() and md_write_start() 2017-06-13 10:18:01 -07:00
linear.h
Makefile dm zoned: drive-managed zoned block device target 2017-06-19 11:05:20 -04:00
md-cluster.c md-cluster: fix potential lock issue in add_new_disk 2017-05-21 20:37:09 -07:00
md-cluster.h
md.c MD: not clear ->safemode for external metadata array 2017-08-11 20:42:06 -07:00
md.h md: raid1-10: move raid1/raid10 common code into raid1-10.c 2017-07-21 12:47:20 -07:00
multipath.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md 2017-07-08 12:50:18 -07:00
multipath.h
raid1-10.c md: raid1-10: move raid1/raid10 common code into raid1-10.c 2017-07-21 12:47:20 -07:00
raid1.c md: simplify code with bio_io_error 2017-07-21 13:16:52 -07:00
raid1.h md/raid1: Use a new variable to count flighting sync requests 2017-04-27 14:01:16 -07:00
raid5-cache.c md/r5cache: fix io_unit handling in r5l_log_endio() 2017-08-08 07:42:37 -07:00
raid5-log.h md/r5cache: gracefully handle journal device errors for writeback mode 2017-05-11 22:11:11 -07:00
raid5-ppl.c raid5-ppl: use BIOSET_NEED_BVECS when creating bioset 2017-07-12 09:26:37 -07:00
raid5.c md/raid5: add thread_group worker async_tx_issue_pending_all 2017-07-24 07:49:15 -07:00
raid5.h - A major update for DM cache that reduces the latency for deciding 2017-05-03 10:31:20 -07:00
raid10.c md: simplify code with bio_io_error 2017-07-21 13:16:52 -07:00
raid10.h md/raid10: simplify the splitting of requests. 2017-04-11 10:13:02 -07:00
raid0.c md: fix deadlock between mddev_suspend() and md_write_start() 2017-06-13 10:18:01 -07:00
raid0.h