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 <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

2006-05-11 12:38:59 -07:00

..

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

…

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

…

scsi_ioctl.c

[SCSI] unify SCSI_IOCTL_SEND_COMMAND implementations

2006-04-13 10:13:15 -05:00