Jens Axboe dac07ec121 [BLOCK] limit request_fn recursion ... Don't recurse back into the driver even if the unplug threshold is met, when the driver asks for a requeue. This is both silly from a logical point of view (requeues typically happen due to driver/hardware shortage), and also dangerous since we could hit an endless request_fn -> requeue -> unplug -> request_fn loop and crash on stack overrun. Also limit blk_run_queue() to one level of recursion, similar to how blk_start_queue() works. This patch fixed a real problem with SLES10 and lpfc, and it could hit any SCSI lld that returns non-zero from it's ->queuecommand() handler. Signed-off-by: Jens Axboe <axboe@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		2006-05-11 12:38:59 -07:00
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as-iosched.c	[PATCH 1/2] iosched: fix typo and barrier()	2006-04-18 09:44:06 +02:00
blktrace.c	[PATCH] Block queue IO tracing support (blktrace) as of 2006-03-23	2006-03-23 20:00:26 +01:00
cfq-iosched.c	[PATCH] cfq: Further rbtree traversal and cfq_exit_queue() race fix	2006-04-18 19:18:31 +02:00
deadline-iosched.c	[PATCH] fix rmmod problems with elevator attributes, clean them up	2006-03-18 22:27:18 -05:00
elevator.c	[BLOCK] limit request_fn recursion	2006-05-11 12:38:59 -07:00
genhd.c	[BLOCK] Fix oops on removal of SD/MMC card	2006-05-05 17:57:52 +01:00
ioctl.c	[PATCH] Block queue IO tracing support (blktrace) as of 2006-03-23	2006-03-23 20:00:26 +01:00
Kconfig	[PATCH] config: fix CONFIG_LFS option	2006-03-31 12:18:55 -08:00
Kconfig.iosched	[BLOCK] iosched: fix setting of default io scheduler	2005-11-04 08:44:58 +01:00
ll_rw_blk.c	[BLOCK] limit request_fn recursion	2006-05-11 12:38:59 -07:00
Makefile	[PATCH] Block queue IO tracing support (blktrace) as of 2006-03-23	2006-03-23 20:00:26 +01:00
noop-iosched.c	[BLOCK] noop-iosched: reimplementation of request dispatching	2005-11-12 10:56:52 +01:00
scsi_ioctl.c	[SCSI] unify SCSI_IOCTL_SEND_COMMAND implementations	2006-04-13 10:13:15 -05:00