Jens Axboe 62c1fe9d9f cfq-iosched: fix race between exiting queue and exiting task ... Original patch from Nikanth Karthikesan <knikanth@suse.de> When a queue exits the queue lock is taken and cfq_exit_queue() would free all the cic's associated with the queue. But when a task exits, cfq_exit_io_context() gets cic one by one and then locks the associated queue to call __cfq_exit_single_io_context. It looks like between getting a cic from the ioc and locking the queue, the queue might have exited on another cpu. Fix this by rechecking the cfq_io_context queue key inside the queue lock again, and not calling into __cfq_exit_single_io_context() if somebody beat us to it. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>		2008-12-29 08:29:52 +01:00
..
Kconfig	Get rid of CONFIG_LSF	2008-12-29 08:29:51 +01:00
Kconfig.iosched	update I/O sched Kconfig help texts - CFQ is now default, not AS.	2007-02-17 20:08:22 +01:00
Makefile	block: unify request timeout handling	2008-10-09 08:56:13 +02:00
as-iosched.c	block: get rid of elevator_t typedef	2008-12-29 08:29:50 +01:00
blk-barrier.c	block: fix empty barrier on write-through w/ ordered tag	2008-12-29 08:28:45 +01:00
blk-core.c	block: don't use plugging on SSD devices	2008-12-29 08:28:45 +01:00
blk-exec.c	Add some block/ source files to the kernel-api docbook. Fix kernel-doc notation in them as needed. Fix changed function parameter names. Fix typos/spellos. In comments, change REQ_SPECIAL to REQ_TYPE_SPECIAL and REQ_BLOCK_PC to REQ_TYPE_BLOCK_PC.	2008-10-09 08:56:03 +02:00
blk-integrity.c	block: Switch blk_integrity_compare from bdev to gendisk	2008-10-09 08:56:21 +02:00
blk-ioc.c	cfq-iosched: fix RCU race in the cfq io_context destructor handling	2008-05-07 09:28:57 +02:00
blk-map.c	When block layer fails to map iov, it calls bio_unmap_user to undo	2008-12-03 12:41:20 +01:00
blk-merge.c	block: remove unused ll_new_mergeable()	2008-11-06 08:41:55 +01:00
blk-settings.c	block: use min_not_zero in blk_queue_stack_limits	2008-12-29 08:29:51 +01:00
blk-softirq.c	block: make blk_softirq_init() static	2008-12-29 08:29:51 +01:00
blk-sysfs.c	block: don't take lock on changing ra_pages	2008-12-29 08:28:43 +01:00
blk-tag.c	block/blk-tag.c: cleanup kernel-doc	2008-12-29 08:28:43 +01:00
blk-timeout.c	block: leave the request timeout timer running even on an empty list	2008-12-29 08:28:42 +01:00
blk.h	block: remove __generic_unplug_device() from exports	2008-10-17 14:03:08 +02:00
blktrace.c	blktrace: port to tracepoints	2008-11-26 12:13:34 +01:00
bsg.c	Enforce a minimum SG_IO timeout	2008-12-05 14:49:18 -08:00
cfq-iosched.c	cfq-iosched: fix race between exiting queue and exiting task	2008-12-29 08:29:52 +01:00
cmd-filter.c	[PATCH] introduce fmode_t, do annotations	2008-10-21 07:47:06 -04:00
compat_ioctl.c	block: don't take lock on changing ra_pages	2008-12-29 08:28:43 +01:00
deadline-iosched.c	block: get rid of elevator_t typedef	2008-12-29 08:29:50 +01:00
elevator.c	block: get rid of elevator_t typedef	2008-12-29 08:29:50 +01:00
genhd.c	block: add one-hit cache for disk partition lookup	2008-12-29 08:29:51 +01:00
ioctl.c	block: don't take lock on changing ra_pages	2008-12-29 08:28:43 +01:00
noop-iosched.c	block: get rid of elevator_t typedef	2008-12-29 08:29:50 +01:00
scsi_ioctl.c	scsi-ioctl: use clock_t <> jiffies	2008-12-29 08:28:42 +01:00