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authorLinus Torvalds <torvalds@linux-foundation.org>2016-01-11 18:53:13 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-11 18:53:13 -0800
commit0f8c7901039f8b1366ae364462743c8f4125822e (patch)
tree27cbd63383fdbce3ceca1ff2d248b3add78aa1ef /Documentation
parent3d116a66ed9df0271b8d267093b3bfde2be19b3a (diff)
parent6201171e3b2c02992e62448636631a0dfe4e9d20 (diff)
Merge branch 'for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
Pull workqueue update from Tejun Heo: "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." * 'for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq: workqueue: simplify the apply_workqueue_attrs_locked() workqueue: implement lockup detector watchdog: introduce touch_softlockup_watchdog_sched() workqueue: warn if memory reclaim tries to flush !WQ_MEM_RECLAIM workqueue
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/kernel-parameters.txt9
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 1a44a7a7f71d..1a8169ba29e6 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -4140,6 +4140,15 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
or other driver-specific files in the
Documentation/watchdog/ directory.
+ workqueue.watchdog_thresh=
+ If CONFIG_WQ_WATCHDOG is configured, workqueue can
+ warn stall conditions and dump internal state to
+ help debugging. 0 disables workqueue stall
+ detection; otherwise, it's the stall threshold
+ duration in seconds. The default value is 30 and
+ it can be updated at runtime by writing to the
+ corresponding sysfs file.
+
workqueue.disable_numa
By default, all work items queued to unbound
workqueues are affine to the NUMA nodes they're