https://github.com/torvalds/linux
Revision a8c32a5c98943d370ea606a2e7dc04717eb92206 authored by Jens Axboe on 06 November 2012, 11:24:26 UTC, committed by Jens Axboe on 23 November 2012, 13:32:54 UTC
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. Cc: stable@kernel.org Acked-by: Alasdair G Kergon <agk@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
1 parent eac7cc5
Tip revision: a8c32a5c98943d370ea606a2e7dc04717eb92206 authored by Jens Axboe on 06 November 2012, 11:24:26 UTC
dm: fix deadlock with request based dm and queue request_fn recursion
dm: fix deadlock with request based dm and queue request_fn recursion
Tip revision: a8c32a5
| File | Mode | Size |
|---|---|---|
| partitions | ||
| Kconfig | -rw-r--r-- | 3.2 KB |
| Kconfig.iosched | -rw-r--r-- | 1.6 KB |
| Makefile | -rw-r--r-- | 720 bytes |
| blk-cgroup.c | -rw-r--r-- | 24.2 KB |
| blk-cgroup.h | -rw-r--r-- | 13.6 KB |
| blk-core.c | -rw-r--r-- | 81.0 KB |
| blk-exec.c | -rw-r--r-- | 3.1 KB |
| blk-flush.c | -rw-r--r-- | 13.1 KB |
| blk-integrity.c | -rw-r--r-- | 11.5 KB |
| blk-ioc.c | -rw-r--r-- | 10.2 KB |
| blk-iopoll.c | -rw-r--r-- | 5.9 KB |
| blk-lib.c | -rw-r--r-- | 6.9 KB |
| blk-map.c | -rw-r--r-- | 8.2 KB |
| blk-merge.c | -rw-r--r-- | 12.7 KB |
| blk-settings.c | -rw-r--r-- | 26.3 KB |
| blk-softirq.c | -rw-r--r-- | 4.5 KB |
| blk-sysfs.c | -rw-r--r-- | 15.5 KB |
| blk-tag.c | -rw-r--r-- | 9.7 KB |
| blk-throttle.c | -rw-r--r-- | 30.8 KB |
| blk-timeout.c | -rw-r--r-- | 4.7 KB |
| blk.h | -rw-r--r-- | 7.1 KB |
| bsg-lib.c | -rw-r--r-- | 6.2 KB |
| bsg.c | -rw-r--r-- | 23.7 KB |
| cfq-iosched.c | -rw-r--r-- | 108.1 KB |
| compat_ioctl.c | -rw-r--r-- | 20.8 KB |
| deadline-iosched.c | -rw-r--r-- | 11.1 KB |
| elevator.c | -rw-r--r-- | 23.0 KB |
| genhd.c | -rw-r--r-- | 43.4 KB |
| ioctl.c | -rw-r--r-- | 10.7 KB |
| noop-iosched.c | -rw-r--r-- | 2.5 KB |
| partition-generic.c | -rw-r--r-- | 14.0 KB |
| scsi_ioctl.c | -rw-r--r-- | 19.6 KB |
Computing file changes ...
