Jens Axboe 07416d29bc cfq-iosched: fix RCU race in the cfq io_context destructor handling ...

put_io_context() drops the RCU read lock before calling into cfq_dtor(),
however we need to hold off freeing there before grabbing and
dereferencing the first object on the list.

So extend the rcu_read_lock() scope to cover the calling of cfq_dtor(),
and optimize cfq_free_io_context() to use a new variant for
call_for_each_cic() that assumes the RCU read lock is already held.

Hit in the wild by Alexey Dobriyan <adobriyan@gmail.com>

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

2008-05-07 09:28:57 +02:00

..

as-iosched.c

block: kill swap_io_context()

2008-02-01 11:34:49 +01:00

blk-barrier.c

block: remove remaining __FUNCTION__ occurrences

2008-05-01 08:04:02 -07:00

blk-core.c

block: remove remaining __FUNCTION__ occurrences

2008-05-01 08:04:02 -07:00

blk-exec.c

block: make core bits checkpatch compliant

2008-02-01 09:26:33 +01:00

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

block: add dma alignment and padding support to blk_rq_map_kern

2008-04-29 09:50:34 +02:00

blk-merge.c

block: make queue flags non-atomic

2008-04-29 14:48:33 +02:00

blk-settings.c

block: remove remaining __FUNCTION__ occurrences

2008-05-01 08:04:02 -07:00

blk-sysfs.c

block: sysfs store function needs to grab queue_lock and use queue_flag_*()

2008-05-07 09:09:39 +02:00

blk-tag.c

block: adjust tagging function queue bit locking

2008-05-07 09:27:43 +02:00

blk.h

block: rename and export rq_init()

2008-04-29 14:48:55 +02:00

blktrace.c

blktrace: Add blktrace ioctls to SCSI generic devices

2008-01-28 10:04:46 +01:00

bsg.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6

2008-05-02 13:52:35 -07:00

cfq-iosched.c

cfq-iosched: fix RCU race in the cfq io_context destructor handling

2008-05-07 09:28:57 +02:00

compat_ioctl.c

ide: remove broken/dangerous HDIO_[UNREGISTER,SCAN]_HWIF ioctls (take 3)

2008-04-18 00:46:24 +02:00

deadline-iosched.c

block: let elv_register() return void

2007-12-18 08:29:28 +01:00

elevator.c

block: remove remaining __FUNCTION__ occurrences

2008-05-01 08:04:02 -07:00

genhd.c

mm: bdi: export BDI attributes in sysfs

2008-04-30 08:29:49 -07:00

ioctl.c

compat_ioctl: move common block ioctls to compat_blkdev_ioctl

2007-10-10 09:26:00 +02:00

Kconfig

Kconfig: clean up block/Kconfig help descriptions

2008-04-21 09:51:04 +02:00

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: ll_rw_blk.c split, add blk-merge.c

2008-01-29 21:55:12 +01:00

noop-iosched.c

block: let elv_register() return void

2007-12-18 08:29:28 +01:00

scsi_ioctl.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6

2008-05-02 13:52:35 -07:00