Tejun Heo 255bb490c8 block: blk-flush shouldn't call directly into q->request_fn() __blk_run_queue() ... blk-flush decomposes a flush into sequence of multiple requests. On completion of a request, the next one is queued; however, block layer must not implicitly call into q->request_fn() directly from completion path. This makes the queue behave unexpectedly when seen from the drivers and violates the assumption that q->request_fn() is called with process context + queue_lock. This patch makes blk-flush the following two changes to make sure q->request_fn() is not called directly from request completion path. - blk_flush_complete_seq_end_io() now asks __blk_run_queue() to always use kblockd instead of calling directly into q->request_fn(). - queue_next_fseq() uses ELEVATOR_INSERT_REQUEUE instead of ELEVATOR_INSERT_FRONT so that elv_insert() doesn't try to unplug the request queue directly. Reported by Jan in the following threads. http://thread.gmane.org/gmane.linux.ide/48778 http://thread.gmane.org/gmane.linux.ide/48786 stable: applicable to v2.6.37. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Jan Beulich <JBeulich@novell.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: stable@kernel.org Signed-off-by: Jens Axboe <jaxboe@fusionio.com>		2011-03-02 08:48:06 -05:00
..
blk-cgroup.c
blk-cgroup.h
blk-core.c	block: add @force_kblockd to __blk_run_queue()	2011-03-02 08:48:05 -05:00
blk-exec.c
blk-flush.c	block: blk-flush shouldn't call directly into q->request_fn() __blk_run_queue()	2011-03-02 08:48:06 -05:00
blk-integrity.c
blk-ioc.c
blk-iopoll.c
blk-lib.c	block: fix kernel-doc format for blkdev_issue_zeroout	2011-03-01 13:45:24 -05:00
blk-map.c
blk-merge.c	Merge branch 'for-2.6.38/core' of git://git.kernel.dk/linux-2.6-block	2011-01-13 10:45:01 -08:00
blk-settings.c
blk-softirq.c
blk-sysfs.c
blk-tag.c
blk-throttle.c	blk-throttle: Do not use kblockd workqueue for throtl work	2011-03-01 13:41:53 -05:00
blk-timeout.c
blk.h
bsg.c
cfq-iosched.c	block: add @force_kblockd to __blk_run_queue()	2011-03-02 08:48:05 -05:00
cfq.h
compat_ioctl.c
deadline-iosched.c
elevator.c	block: add @force_kblockd to __blk_run_queue()	2011-03-02 08:48:05 -05:00
genhd.c	Fix over-zealous flush_disk when changing device size.	2011-02-24 17:25:47 +11:00
ioctl.c	block: fix refcounting in BLKBSZSET	2011-02-24 08:54:21 -08:00
Kconfig	kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT	2011-01-20 17:02:05 -08:00
Kconfig.iosched
Makefile
noop-iosched.c
scsi_ioctl.c