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Jens Axboe 5fccbf61be [PATCH] CFQ: request <-> request merging rr_list fixup 
In very rare circumstances would we be pruning a merged request and at
the same time delete the implicated cfqq from the rr_list, and not readd
it when the merged request got added. This could cause io stalls until
that process issued io again.

Fix it up by putting the rr_list add handling into cfq_add_rq_rb(),
identical to how pruning is handled in cfq_del_rq_rb(). This fixes a
hang reproducible with fsx-linux.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
 		2006-10-31 08:12:45 -08:00
..
Kconfig [PATCH] Only enable CONFIG_BLOCK option for embedded 2006-09-30 21:14:05 +02:00
Kconfig.iosched [PATCH] BLOCK: Make it possible to disable the block layer [try #6] 2006-09-30 20:52:31 +02:00
Makefile [PATCH] BLOCK: Make it possible to disable the block layer [try #6] 2006-09-30 20:52:31 +02:00
as-iosched.c [PATCH] completions: lockdep annotate on stack completions 2006-10-01 00:39:24 -07:00
blktrace.c [PATCH] Update axboe@suse.de email address 2006-09-30 20:52:34 +02:00
cfq-iosched.c [PATCH] CFQ: request <-> request merging rr_list fixup 2006-10-31 08:12:45 -08:00
deadline-iosched.c [PATCH] Update axboe@suse.de email address 2006-09-30 20:52:34 +02:00
elevator.c [PATCH] block layer: elv_iosched_show should get elv_list_lock 2006-10-12 15:08:51 +02:00
genhd.c [PATCH] block: handle subsystem_register() init errors 2006-09-29 09:18:05 -07:00
ioctl.c [PATCH] dm: export blkdev_driver_ioctl 2006-10-03 08:04:13 -07:00
ll_rw_blk.c [PATCH] md: check bio address after mapping through partitions. 2006-10-31 08:07:01 -08:00
noop-iosched.c [PATCH] Make sure all block/io scheduler setups are node aware 2006-09-30 20:29:39 +02:00
scsi_ioctl.c [PATCH] Split struct request ->flags into two parts 2006-09-30 20:23:37 +02:00