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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>		19 years ago
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Kconfig	…
Kconfig.iosched	…
Makefile	…
as-iosched.c	…
blktrace.c	…
cfq-iosched.c	…
deadline-iosched.c	…
elevator.c	[BLOCK] limit request_fn recursion	19 years ago
genhd.c	…
ioctl.c	…
ll_rw_blk.c	[BLOCK] limit request_fn recursion	19 years ago
noop-iosched.c	…
scsi_ioctl.c	…