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e9e6f3ec53
linux/drivers/block
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Lars Ellenberg e9e6f3ec53 drbd: fix for possible deadlock on IO error during resync 
Scenario:

Something (say, flush-147:0) is in drbd_al_begin_io,
holding a local_cnt, waiting for the resync to make progress.

Disk fails, worker in after_state_ch does drbd_rs_cancel_all,
then waits for local_cnt to drop to zero.

flush-147:0 is woken by drbd_rs_cancel_all, needs to write an AL
transaction, and queues that on the worker.

Deadlock.

Fix: do not wait in the worker, have put_ldev() trigger the
state change D_FAILED -> D_DISKLESS when necessary.
put_ldev() cannot do the state change directly, as it may or may not
already hold various spinlocks. We queue a short work instead.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
2010-10-14 18:38:50 +02:00
..
aoe block: push down BKL into .open and .release 2010-08-07 18:25:34 +02:00
drbd drbd: fix for possible deadlock on IO error during resync 2010-10-14 18:38:50 +02:00
paride block: push down BKL into .open and .release 2010-08-07 18:25:34 +02:00
amiflop.c amiga floppy: Compile failure fixes 2010-09-26 12:23:25 +09:00
ataflop.c atari floppy: Stop sharing request queue across multiple gendisks 2010-09-24 20:35:45 +02:00
brd.c block: push down BKL into .locked_ioctl 2010-08-07 18:25:00 +02:00
cciss_cmd.h cciss: fix hard reset code. 2010-08-07 18:52:30 +02:00
cciss_scsi.c cciss: change printks to dev_warn, etc. 2010-08-07 18:52:30 +02:00
cciss_scsi.h cciss: remove C99-style comments 2010-02-22 13:44:45 +01:00
cciss.c cciss: remove some superfluous tests from cciss_bigpassthru() 2010-09-10 12:12:40 +02:00
cciss.h cciss: use consistent variable names 2010-08-07 18:52:30 +02:00
cpqarray.c cpqarray: check put_user() result 2010-08-07 18:53:03 +02:00
cpqarray.h
cryptoloop.c drivers: Remove unnecessary inclusions of asm/semaphore.h 2008-04-18 22:16:32 -04:00
DAC960.c block: push down BKL into .open and .release 2010-08-07 18:25:34 +02:00
DAC960.h
floppy.c floppy: switch to one queue per drive instead of sharing a queue 2010-09-22 09:32:36 +02:00
hd.c block: remove wrappers for request type/flags 2010-08-07 18:17:56 +02:00
ida_cmd.h
ida_ioctl.h
Kconfig paride: fix menu indentation 2010-05-11 09:02:55 +02:00
loop.c loop: add some basic read-only sysfs attributes 2010-08-23 15:18:10 +02:00
Makefile The DRBD driver 2009-10-01 21:17:49 +02:00
mg_disk.c block: remove wrappers for request type/flags 2010-08-07 18:17:56 +02:00
nbd.c Merge branch 'for-2.6.36' of git://git.kernel.dk/linux-2.6-block 2010-08-10 15:22:42 -07:00
osdblk.c block: remove q->prepare_flush_fn completely 2010-08-07 18:24:15 +02:00
pktcdvd.c block: push down BKL into .open and .release 2010-08-07 18:25:34 +02:00
ps3disk.c block: remove q->prepare_flush_fn completely 2010-08-07 18:24:15 +02:00
ps3vram.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
smart1,2.h
sunvdc.c block: Consolidate phys_segment and hw_segment limits 2010-02-26 13:58:08 +01:00
swim3.c block: push down BKL into .open and .release 2010-08-07 18:25:34 +02:00
swim_asm.S m68k: mac - Add SWIM floppy support 2009-03-26 21:15:27 +01:00
swim.c block: push down BKL into .open and .release 2010-08-07 18:25:34 +02:00
sx8.c block: Consolidate phys_segment and hw_segment limits 2010-02-26 13:58:08 +01:00
ub.c block: push down BKL into .open and .release 2010-08-07 18:25:34 +02:00
umem.c block: unify flags for struct bio and struct request 2010-08-07 18:20:39 +02:00
umem.h
viodasd.c block: push down BKL into .open and .release 2010-08-07 18:25:34 +02:00
virtio_blk.c Merge branch 'for-2.6.36' of git://git.kernel.dk/linux-2.6-block 2010-08-10 15:22:42 -07:00
xd.c block: push down BKL into .locked_ioctl 2010-08-07 18:25:00 +02:00
xd.h [PATCH] switch xd 2008-10-21 07:48:11 -04:00
xen-blkfront.c Merge branch 'for-2.6.36' of git://git.kernel.dk/linux-2.6-block 2010-08-10 15:22:42 -07:00
xsysace.c of: fix missing headers for of_address_to_resource() in MTD and SysACE drivers 2010-08-17 13:16:47 -06:00
z2ram.c block: push down BKL into .open and .release 2010-08-07 18:25:34 +02:00