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Invert cpu_hotplug_lock and cpuset_mutex locking order.

Prateek Sood cgroups lkml 3 versions – Applied

Status from this message: Applied to cgroup/for-4.15-fixes.

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  1. v3 Latest2 patches 1 replyApplied
  2. v21 patch 5 repliesSuperseded
  3. v11 patch 2 repliesSuperseded

Patches in v3 Applied

#Subject and filesSizeRepliesApplied
1/2cgroup/cpuset: remove circular dependency deadlockkernel/cgroup/cpuset.c+30 -230 replies
2/2cpuset: Make cpuset hotplug synchronousinclude/linux/cpuset.h kernel/cgroup/cpuset.c kernel/power/process.c +1 more+20 -300 replies

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Cover letter [PATCH v3 0/2] Invert cpu_hotplug_lock and cpuset_mutex locking order.

This patch does following
1- Remove circular dependency deadlock by inverting order of
cpu_hotplug_lock and cpuset_mutex.
2- Make cpuset_hotplug_workfn() synchronous for cpu hotplug path.
For memory hotplug path it still gets queued as a work item.

Prateek Sood (2):
cgroup/cpuset: remove circular dependency deadlock
cpuset: Make cpuset hotplug synchronous

 include/linux/cpuset.h |  6 ----
 kernel/cgroup/cpuset.c | 94 +++++++++++++++++++++++++++-----------------------
 kernel/power/process.c |  2 --
 kernel/sched/core.c    |  1 -
 4 files changed, 50 insertions(+), 53 deletions(-)
Signature · 2 lines
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Read the cover letter in its thread