Jens Axboe 2d7c6b713f dm: fix deadlock with request based dm and queue request_fn recursion ...

commit a8c32a5c98 upstream.

Request based dm attempts to re-run the request queue off the
request completion path. If used with a driver that potentially does
end_io from its request_fn, we could deadlock trying to recurse
back into request dispatch. Fix this by punting the request queue
run to kblockd.

Tested to fix a quickly reproducible deadlock in such a scenario.

Acked-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2012-12-03 12:59:14 -08:00

..

bitmap.c

md/bitmap: prevent bitmap_daemon_work running while initialising bitmap

2012-04-22 16:21:44 -07:00

bitmap.h

md/bitmap: remove unused fields from struct bitmap

2011-06-09 11:43:01 +10:00

dm-bio-record.h

…

dm-crypt.c

dm crypt: add missing error handling

2012-04-02 09:27:19 -07:00

dm-delay.c

dm: convert workqueues to alloc_ordered

2011-01-13 19:59:57 +00:00

dm-exception-store.c

dm exception store: fix init error path

2012-04-02 09:27:19 -07:00

dm-exception-store.h

dm snapshot: test chunk size against both origin and snapshot

2010-08-12 04:13:51 +01:00

dm-flakey.c

dm: do not forward ioctls from logical volumes to the underlying device

2012-01-25 17:24:54 -08:00

dm-io.c

dm io: fix discard support

2012-03-12 10:33:01 -07:00

dm-ioctl.c

dm ioctl: add flag to wipe buffers for secure data

2011-03-24 13:54:30 +00:00

dm-kcopyd.c

dm kcopyd: return client directly and not through a pointer

2011-05-29 13:03:13 +01:00

dm-linear.c

dm: do not forward ioctls from logical volumes to the underlying device

2012-01-25 17:24:54 -08:00

dm-log-userspace-base.c

dm log userspace: add version number to comms

2011-01-13 19:59:52 +00:00

dm-log-userspace-transfer.c

netlink: kill eff_cap from struct netlink_skb_parms

2011-03-03 13:32:07 -08:00

dm-log-userspace-transfer.h

…

dm-log.c

dm io: use fixed initial mempool size

2011-05-29 13:03:09 +01:00

dm-mpath.c

dm: do not forward ioctls from logical volumes to the underlying device

2012-01-25 17:24:54 -08:00

dm-mpath.h

…

dm-path-selector.c

…

dm-path-selector.h

…

dm-queue-length.c

…

dm-raid1.c

dm raid1: fix crash with mirror recovery and discard

2012-08-01 12:26:54 -07:00

dm-raid.c

dm raid: fix flush support

2012-03-12 10:33:01 -07:00

dm-region-hash.c

dm raid1: fix crash with mirror recovery and discard

2012-08-01 12:26:54 -07:00

dm-round-robin.c

…

dm-service-time.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

dm-snap-persistent.c

dm snapshot: flush disk cache when merging

2011-08-04 21:58:42 -07:00

dm-snap-transient.c

dm snapshot: move cow ref from exception store to snap core

2009-12-10 23:52:12 +00:00

dm-snap.c

dm kcopyd: return client directly and not through a pointer

2011-05-29 13:03:13 +01:00

dm-stripe.c

dm stripe: implement merge method

2011-03-24 13:54:35 +00:00

dm-sysfs.c

Driver core: Constify struct sysfs_ops in struct kobj_type

2010-03-07 17:04:49 -08:00

dm-table.c

dm table: avoid crash if integrity profile changes

2011-10-16 14:14:53 -07:00

dm-target.c

dm: error return error for discards

2010-08-12 04:14:14 +01:00

dm-uevent.c

dm table: remove dm_get from dm_table_get_md

2010-03-06 02:29:52 +00:00

dm-uevent.h

…

dm-zero.c

dm: zero silently drop discards

2010-08-12 04:14:12 +01:00

dm.c

dm: fix deadlock with request based dm and queue request_fn recursion

2012-12-03 12:59:14 -08:00

dm.h

block: Require subsystems to explicitly allocate bio_set integrity mempool

2011-03-17 11:11:05 +01:00

faulty.c

Fix common misspellings

2011-03-31 11:26:23 -03:00

Kconfig

dm: add flakey target

2011-03-24 13:54:24 +00:00

linear.c

block: Require subsystems to explicitly allocate bio_set integrity mempool

2011-03-17 11:11:05 +01:00

linear.h

md/linear: avoid corrupting structure while waiting for rcu_free to complete.

2011-10-03 11:40:03 -07:00

Makefile

dm: add flakey target

2011-03-24 13:54:24 +00:00

md.c

md: Don't truncate size at 4TB for RAID0 and Linear

2012-10-02 09:47:25 -07:00

md.h

md: Avoid waking up a thread after it has been freed.

2011-10-16 14:14:53 -07:00

multipath.c

md: Avoid waking up a thread after it has been freed.

2011-10-16 14:14:53 -07:00

multipath.h

md/multipath: discard ->working_disks in favour of ->degraded

2011-05-11 14:38:02 +10:00

raid0.c

block: Require subsystems to explicitly allocate bio_set integrity mempool

2011-03-17 11:11:05 +01:00

raid0.h

md: fix handling of array level takeover that re-arranges devices.

2010-06-24 13:33:24 +10:00

raid1.c

md/raid1,raid10: avoid deadlock during resync/recovery.

2012-04-02 09:27:11 -07:00

raid1.h

MD: raid1 changes to allow use by device mapper

2011-06-08 15:11:31 +10:00

raid5.c

md/raid5: Do not add data_offset before call to is_badblock

2012-07-16 08:47:51 -07:00

raid5.h

md - remove old plugging code.

2011-04-18 18:25:42 +10:00

raid10.c

md/raid10: Don't try to recovery unmatched (and unused) chunks.

2012-07-16 08:47:52 -07:00

raid10.h

Fix common misspellings

2011-03-31 11:26:23 -03:00