[GIT PULL] workqueue changes for v4.5-rc1

[Tejun Heo]

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