workqueue changes for v4.5-rc1

Hello, Linus.

workqueue changes for v4.5. One cleanup patch and three to improve the debuggability. Workqueue now has a stall detector which dumps workqueue state if any worker pool hasn't made forward progress over a certain amount of time (30s by default) and also triggers a warning if a workqueue which can be used in memory reclaim path tries to wait on something which can't be. These should make workqueue hangs a lot easier to debug.

Thanks.

The following changes since commit afd2ff9b7e1b367172f18ba7f693dfb62bdcb2dc:

Linux 4.4 (2016-01-10 15:01:32 -0800)

are available in the git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata.git

for you to fetch changes up to 392b20caaf77b68c2039815568c0391da5a95ff9:

Merge branch 'for-4.5' into test-merge-for-4.5 (2016-01-11 14:05:12 -0500)

----------------------------------------------------------------
Tejun Heo (4):
workqueue: warn if memory reclaim tries to flush !WQ_MEM_RECLAIM workqueue
watchdog: introduce touch_softlockup_watchdog_sched()
workqueue: implement lockup detector
Merge branch 'for-4.5' into test-merge-for-4.5

wanghaibin (1):
workqueue: simplify the apply_workqueue_attrs_locked()

 Documentation/kernel-parameters.txt |   9 ++
 include/linux/sched.h               |   4 +
 include/linux/workqueue.h           |   6 +
 kernel/sched/clock.c                |   2 +-
 kernel/time/tick-sched.c            |   6 +-
 kernel/watchdog.c                   |  18 ++-
 kernel/workqueue.c                  | 220 ++++++++++++++++++++++++++++++++++--
 lib/Kconfig.debug                   |  11 ++
 8 files changed, 261 insertions(+), 15 deletions(-)

tejun

Hello, Linus. I messed up the request-pull part of the previous message. Here's the correct one.

workqueue changes for v4.5. One cleanup patch and three to improve the debuggability. Workqueue now has a stall detector which dumps workqueue state if any worker pool hasn't made forward progress over a certain amount of time (30s by default) and also triggers a warning if a workqueue which can be used in memory reclaim path tries to wait on something which can't be. These should make workqueue hangs a lot easier to debug.

Thanks.

The following changes since commit 527e9316f8ec44bd53d90fb9f611fa7ffff52bb9:

Linux 4.4-rc4 (2015-12-06 15:43:12 -0800)

are available in the git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq.git for-4.5

for you to fetch changes up to 6201171e3b2c02992e62448636631a0dfe4e9d20:

workqueue: simplify the apply_workqueue_attrs_locked() (2016-01-07 11:04:34 -0500)

----------------------------------------------------------------
Tejun Heo (3):
workqueue: warn if memory reclaim tries to flush !WQ_MEM_RECLAIM workqueue
watchdog: introduce touch_softlockup_watchdog_sched()
workqueue: implement lockup detector

wanghaibin (1):
workqueue: simplify the apply_workqueue_attrs_locked()

 Documentation/kernel-parameters.txt |   9 ++
 include/linux/sched.h               |   4 +
 include/linux/workqueue.h           |   6 +
 kernel/sched/clock.c                |   2 +-
 kernel/time/tick-sched.c            |   6 +-
 kernel/watchdog.c                   |  18 ++-
 kernel/workqueue.c                  | 220 ++++++++++++++++++++++++++++++++++--
 lib/Kconfig.debug                   |  11 ++
 8 files changed, 261 insertions(+), 15 deletions(-)

tejun