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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-02-10 11:04:05 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-02-10 11:04:05 -0800 |
| commit | 9aece75c138d93bde79a2baeb9187a1109b4e952 (patch) | |
| tree | 6232a1670592937d5aa5d4250aeb991b686381b1 /lib | |
| parent | 2178cbc68f3602dc0b5949b9be2c8383ad3d93ef (diff) | |
| parent | d6e022f1d207a161cd88e08ef0371554680ffc46 (diff) | |
| download | linux-9aece75c138d93bde79a2baeb9187a1109b4e952.tar.gz linux-9aece75c138d93bde79a2baeb9187a1109b4e952.tar.bz2 linux-9aece75c138d93bde79a2baeb9187a1109b4e952.zip | |
Merge branch 'for-4.5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
Pull workqueue fixes from Tejun Heo:
"Workqueue fixes for v4.5-rc3.
- Remove a spurious triggering of flush dependency warning.
- Officially break local execution guarantee of unbound work items
and add a debug feature to flush out usages which depend on it.
- Work around CPU -> NODE mapping becoming invalid on CPU offline.
The branch is young but pushing out early as stable kernels are being
affected"
* 'for-4.5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
workqueue: handle NUMA_NO_NODE for unbound pool_workqueue lookup
workqueue: implement "workqueue.debug_force_rr_cpu" debug feature
workqueue: schedule WORK_CPU_UNBOUND work on wq_unbound_cpumask CPUs
Revert "workqueue: make sure delayed work run in local cpu"
workqueue: skip flush dependency checks for legacy workqueues
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig.debug | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index ecb9e75614bf..8bfd1aca7a3d 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1400,6 +1400,21 @@ config RCU_EQS_DEBUG endmenu # "RCU Debugging" +config DEBUG_WQ_FORCE_RR_CPU + bool "Force round-robin CPU selection for unbound work items" + depends on DEBUG_KERNEL + default n + help + Workqueue used to implicitly guarantee that work items queued + without explicit CPU specified are put on the local CPU. This + guarantee is no longer true and while local CPU is still + preferred work items may be put on foreign CPUs. Kernel + parameter "workqueue.debug_force_rr_cpu" is added to force + round-robin CPU selection to flush out usages which depend on the + now broken guarantee. This config option enables the debug + feature by default. When enabled, memory and cache locality will + be impacted. + config DEBUG_BLOCK_EXT_DEVT bool "Force extended block device numbers and spread them" depends on DEBUG_KERNEL |