Guoju Fang 0f843e65d9 bcache: add separate workqueue for journal_write to avoid deadlock ... After write SSD completed, bcache schedules journal_write work to system_wq, which is a public workqueue in system, without WQ_MEM_RECLAIM flag. system_wq is also a bound wq, and there may be no idle kworker on current processor. Creating a new kworker may unfortunately need to reclaim memory first, by shrinking cache and slab used by vfs, which depends on bcache device. That's a deadlock. This patch create a new workqueue for journal_write with WQ_MEM_RECLAIM flag. It's rescuer thread will work to avoid the deadlock. Signed-off-by: Guoju Fang <fangguoju@gmail.com> Cc: stable@vger.kernel.org Signed-off-by: Coly Li <colyli@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2018-09-27 09:47:01 -06:00
..
Kconfig	for-4.19/post-20180822	2018-08-22 13:38:05 -07:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
alloc.c	bcache: style fix to add a blank line after declarations	2018-08-11 15:46:41 -06:00
bcache.h	bcache: add separate workqueue for journal_write to avoid deadlock	2018-09-27 09:47:01 -06:00
bset.c	bcache: fix code comments style	2018-08-11 15:46:42 -06:00
bset.h	bcache: style fixes for lines over 80 characters	2018-08-11 15:46:41 -06:00
btree.c	bcache: fix indent by replacing blank by tabs	2018-08-11 15:46:41 -06:00
btree.h	bcache: style fixes for lines over 80 characters	2018-08-11 15:46:41 -06:00
closure.c	bcache: add missing SPDX header	2018-08-11 15:46:42 -06:00
closure.h	bcache: add the missing comments for smp_mb()/smp_wmb()	2018-08-11 15:46:42 -06:00
debug.c	bcache: replace printk() by pr_*() routines	2018-08-11 15:46:41 -06:00
debug.h	bcache: add identifier names to arguments of function definitions	2018-08-11 15:46:41 -06:00
extents.c	bcache: replace printk() by pr_*() routines	2018-08-11 15:46:41 -06:00
extents.h	bcache: add identifier names to arguments of function definitions	2018-08-11 15:46:41 -06:00
io.c	bcache: fix typo 'succesfully' to 'successfully'	2018-08-11 15:46:42 -06:00
journal.c	bcache: add separate workqueue for journal_write to avoid deadlock	2018-09-27 09:47:01 -06:00
journal.h	bcache: add identifier names to arguments of function definitions	2018-08-11 15:46:41 -06:00
movinggc.c	bcache: style fix to add a blank line after declarations	2018-08-11 15:46:41 -06:00
request.c	bcache: do not check NULL pointer before calling kmem_cache_destroy	2018-08-11 15:46:42 -06:00
request.h	bcache: add identifier names to arguments of function definitions	2018-08-11 15:46:41 -06:00
stats.c	bcache: style fix to add a blank line after declarations	2018-08-11 15:46:41 -06:00
stats.h	bcache: add identifier names to arguments of function definitions	2018-08-11 15:46:41 -06:00
super.c	bcache: add separate workqueue for journal_write to avoid deadlock	2018-09-27 09:47:01 -06:00
sysfs.c	bcache: add static const prefix to char * array declarations	2018-08-11 15:46:42 -06:00
sysfs.h	bcache: replace Symbolic permissions by octal permission numbers	2018-08-11 15:46:41 -06:00
trace.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
util.c	for-4.19/post-20180822	2018-08-22 13:38:05 -07:00
util.h	for-4.19/post-20180822	2018-08-22 13:38:05 -07:00
writeback.c	bcache: release dc->writeback_lock properly in bch_writeback_thread()	2018-08-22 15:06:29 -06:00
writeback.h	bcache: add identifier names to arguments of function definitions	2018-08-11 15:46:41 -06:00