AuxXxilium/linux_dsm_epyc7002
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2361ae5953
linux_dsm_epyc7002/drivers/md
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Martin Wilck 2361ae5953 dm mpath: switch paths in dm_blk_ioctl() code path 
SCSI LUN passthrough code such as qemu's "scsi-block" device model
pass every IO to the host via SG_IO ioctls. Currently, dm-multipath
calls choose_pgpath() only in the block IO code path, not in the ioctl
code path (unless current_pgpath is NULL). This has the effect that no
path switching and thus no load balancing is done for SCSI-passthrough
IO, unless the active path fails.

Fix this by using the same logic in multipath_prepare_ioctl() as in
multipath_clone_and_map().

Note: The allegedly best path selection algorithm, service-time,
still wouldn't work perfectly, because the io size of the current
request is always set to 0. Changing that for the IO passthrough
case would require the ioctl cmd and arg to be passed to dm's
prepare_ioctl() method.

Signed-off-by: Martin Wilck <mwilck@suse.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2020-05-15 10:29:35 -04:00
..
bcache for-5.7/drivers-2020-03-29 2020-03-30 11:43:51 -07:00
persistent-data dm space map common: fix to ensure new block isn't already in use 2020-01-14 20:15:53 -05:00
dm-bio-prison-v1.c dm bio prison: replace spin_lock_irqsave with spin_lock_irq 2019-11-05 14:53:03 -05:00
dm-bio-prison-v1.h
dm-bio-prison-v2.c dm bio prison v2: use true/false for bool variable 2020-01-07 12:07:08 -05:00
dm-bio-prison-v2.h
dm-bio-record.h dm bio record: save/restore bi_end_io and bi_integrity 2020-03-03 10:02:46 -05:00
dm-bufio.c dm bufio: introduce a global cache replacement 2019-09-13 17:00:21 -04:00
dm-builtin.c
dm-cache-background-tracker.c
dm-cache-background-tracker.h
dm-cache-block-types.h
dm-cache-metadata.c
dm-cache-metadata.h
dm-cache-policy-internal.h
dm-cache-policy-smq.c
dm-cache-policy.c
dm-cache-policy.h
dm-cache-target.c dm: bump version of core and various targets 2020-03-03 11:10:21 -05:00
dm-clone-metadata.c dm clone metadata: Fix return type of dm_clone_nr_of_hydrated_regions() 2020-03-27 14:42:51 -04:00
dm-clone-metadata.h dm clone metadata: Fix return type of dm_clone_nr_of_hydrated_regions() 2020-03-27 14:42:51 -04:00
dm-clone-target.c dm clone metadata: Fix return type of dm_clone_nr_of_hydrated_regions() 2020-03-27 14:42:51 -04:00
dm-core.h
dm-crypt.c dm crypt: support using encrypted keys 2020-05-15 10:29:34 -04:00
dm-delay.c
dm-dust.c dm dust: change ret to r in dust_map_write 2020-01-07 11:43:36 -05:00
dm-era-target.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
dm-exception-store.c
dm-exception-store.h - Improve DM snapshot target's scalability by using finer grained 2019-05-16 15:55:48 -07:00
dm-flakey.c block: rework zone reporting 2019-11-12 19:12:07 -07:00
dm-init.c docs: device-mapper: move it to the admin-guide 2019-07-15 11:03:01 -03:00
dm-integrity.c dm integrity: fix logic bug in integrity tag testing 2020-04-03 13:07:41 -04:00
dm-io.c
dm-ioctl.c dm: introduce DM_GET_TARGET_VERSION 2019-09-16 10:18:01 -04:00
dm-kcopyd.c dm kcopyd: always complete failed jobs 2019-08-15 15:57:39 -04:00
dm-linear.c dm,dax: Add dax zero_page_range operation 2020-04-02 19:15:03 -07:00
dm-log-userspace-base.c
dm-log-userspace-transfer.c
dm-log-userspace-transfer.h
dm-log-writes.c dm,dax: Add dax zero_page_range operation 2020-04-02 19:15:03 -07:00
dm-log.c
dm-mpath.c dm mpath: switch paths in dm_blk_ioctl() code path 2020-05-15 10:29:35 -04:00
dm-mpath.h
dm-path-selector.c
dm-path-selector.h
dm-queue-length.c
dm-raid1.c dm raid1: use struct_size() with kzalloc() 2019-08-26 11:05:32 -04:00
dm-raid.c dm raid: table line rebuild status fixes 2020-01-07 11:43:37 -05:00
dm-region-hash.c
dm-round-robin.c
dm-rq.c block: Delay default elevator initialization 2019-09-05 19:52:34 -06:00
dm-rq.h
dm-service-time.c
dm-snap-persistent.c block: fix an integer overflow in logical block size 2020-01-15 21:43:09 -07:00
dm-snap-transient.c
dm-snap.c dm snapshot: use true/false for bool variable 2020-01-07 12:07:17 -05:00
dm-stats.c dm stats: use struct_size() helper 2019-09-04 09:39:22 -04:00
dm-stats.h
dm-stripe.c dm,dax: Add dax zero_page_range operation 2020-04-02 19:15:03 -07:00
dm-switch.c
dm-sysfs.c
dm-table.c block: don't handle bio based drivers in blk_revalidate_disk_zones 2019-12-03 08:51:25 -07:00
dm-target.c
dm-thin-metadata.c dm thin metadata: fix lockdep complaint 2020-02-27 12:00:53 -05:00
dm-thin-metadata.h dm thin metadata: Add support for a pre-commit callback 2019-12-05 17:05:24 -05:00
dm-thin.c dm thin: change data device's flush_bio to be member of struct pool 2020-01-14 20:23:13 -05:00
dm-uevent.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
dm-uevent.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
dm-unstripe.c
dm-verity-fec.c dm verity fec: fix hash block number in verity_fec_decode 2020-04-16 16:16:38 -04:00
dm-verity-fec.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
dm-verity-target.c dm: bump version of core and various targets 2020-03-03 11:10:21 -05:00
dm-verity-verify-sig.c dm verity: add root hash pkcs#7 signature verification 2019-08-23 10:13:14 -04:00
dm-verity-verify-sig.h dm verity: add root hash pkcs#7 signature verification 2019-08-23 10:13:14 -04:00
dm-verity.h dm verity: add root hash pkcs#7 signature verification 2019-08-23 10:13:14 -04:00
dm-writecache.c dm writecache: fix data corruption when reloading the target 2020-04-16 16:04:13 -04:00
dm-zero.c
dm-zoned-metadata.c dm zoned: remove duplicate nr_rnd_zones increase in dmz_init_zone() 2020-03-24 12:21:48 -04:00
dm-zoned-reclaim.c dm zoned: reduce overhead of backing device checks 2019-11-07 10:08:36 -05:00
dm-zoned-target.c dm: bump version of core and various targets 2020-03-03 11:10:21 -05:00
dm-zoned.h dm zoned: reduce overhead of backing device checks 2019-11-07 10:08:36 -05:00
dm.c libnvdimm for 5.7 2020-04-08 21:03:40 -07:00
dm.h dm: make dm_table_find_target return NULL 2019-08-23 10:13:12 -04:00
Kconfig dm crypt: support using encrypted keys 2020-05-15 10:29:34 -04:00
Makefile dm: add clone target 2019-09-12 09:32:31 -04:00
md-bitmap.c Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2020-02-08 13:04:49 -08:00
md-bitmap.h
md-cluster.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 45 2019-05-24 17:27:12 +02:00
md-cluster.h
md-faulty.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 47 2019-05-24 17:27:13 +02:00
md-linear.c md: improve handling of bio with REQ_PREFLUSH in md_flush_request() 2019-10-24 15:22:40 -07:00
md-linear.h
md-multipath.c md: improve handling of bio with REQ_PREFLUSH in md_flush_request() 2019-10-24 15:22:40 -07:00
md-multipath.h
md.c for-5.7/drivers-2020-03-29 2020-03-30 11:43:51 -07:00
md.h md: introduce a new struct for IO serialization 2020-01-13 11:44:10 -08:00
raid0.c block: fix an integer overflow in logical block size 2020-01-15 21:43:09 -07:00
raid0.h md/raid0: avoid RAID0 data corruption due to layout confusion. 2019-09-13 13:10:05 -07:00
raid1-10.c md: raid1-10: Unify r{1,10}bio_pool_free 2019-06-15 01:37:35 -06:00
raid1.c md/raid1: introduce wait_for_serialization 2020-01-13 11:44:10 -08:00
raid1.h
raid5-cache.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288 2019-06-05 17:36:37 +02:00
raid5-log.h
raid5-ppl.c treewide: Use sizeof_field() macro 2019-12-09 10:36:44 -08:00
raid5.c raid5: remove worker_cnt_per_group argument from alloc_thread_groups 2020-01-13 11:44:09 -08:00
raid5.h raid5: use bio_end_sector in r5_next_bio 2019-09-13 13:14:43 -07:00
raid10.c md/raid10: prevent access of uninitialized resync_pages offset 2019-11-11 16:47:39 -08:00
raid10.h