The patch titled
debug cgroup: remove unneeded cgroup_lock
has been added to the -mm tree. Its filename is
debug-cgroup-remove-unneeded-cgroup_lock.patch
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------------------------------------------------------
Subject: debug cgroup: remove unneeded cgroup_lock
From: Li Zefan <lizf@xxxxxxxxxxxxxx>
Since we are in cgroup write handler, so the cgrp is valid, so we don't
have to hold cgroup_mutex when calling cgroup_task_count(). One similar
example is in cgroup_tasks_open().
Signed-off-by: Li Zefan <lizf@xxxxxxxxxxxxxx>
Acked-by: Paul Menage <menage@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/cgroup_debug.c | 2 --
1 file changed, 2 deletions(-)
diff -puN kernel/cgroup_debug.c~debug-cgroup-remove-unneeded-cgroup_lock kernel/cgroup_debug.c
--- a/kernel/cgroup_debug.c~debug-cgroup-remove-unneeded-cgroup_lock
+++ a/kernel/cgroup_debug.c
@@ -40,9 +40,7 @@ static u64 taskcount_read(struct cgroup
{
u64 count;
- cgroup_lock();
count = cgroup_task_count(cont);
- cgroup_unlock();
return count;
}
_
Patches currently in -mm which might be from lizf@xxxxxxxxxxxxxx are
vfs-add-missing-unlock-in-sget.patch
linux-next.patch
cls_cgroup-remove-unneeded-cgroup_lock.patch
memdup_user-introduce.patch
memdup_user-introduce-fix.patch
relax-ns_can_attach-checks-to-allow-attaching-to-grandchild-cgroups.patch
cgroup-css-id-support.patch
cgroup-css-id-support-remove-rcu_read_lock-from-css_get_next.patch
cgroup-fix-frequent-ebusy-at-rmdir.patch
cgroups-more-documentation-for-remount-and-release_agent.patch
cgroups-show-correct-file-mode.patch
cgroups-show-correct-file-mode-fix.patch
cgroups-dont-change-release_agent-when-remount-failed.patch
debug-cgroup-remove-unneeded-cgroup_lock.patch
memcg-use-css-id.patch
memcg-hierarchical-stat.patch
memcg-fix-shrinking-memory-to-return-ebusy-by-fixing-retry-algorithm.patch
memcg-fix-oom-killer-under-memcg.patch
memcg-fix-oom-killer-under-memcg-fix2.patch
memcg-fix-oom-killer-under-memcg-fix.patch
memcg-show-memcg-information-during-oom.patch
memcg-show-memcg-information-during-oom-fix2.patch
memcg-show-memcg-information-during-oom-fix.patch
memcg-show-memcg-information-during-oom-fix-fix.patch
memcg-show-memcg-information-during-oom-fix-fix-checkpatch-fixes.patch
memcg-charge-swapcache-to-proper-memcg.patch
cgroups-use-css-id-in-swap-cgroup-for-saving-memory-v5.patch
memory-controller-soft-limit-documentation-v5.patch
memory-controller-soft-limit-interface-v5.patch
memory-controller-soft-limit-organize-cgroups-v5.patch
memory-controller-soft-limit-reclaim-on-contention-v5.patch
cpuset-fix-possible-races-in-cpu-memory-hotplug.patch
cgroups-add-data-field-to-struct-cgroup_scanner.patch
cpuset-rewrite-update_tasks_nodemask.patch
cpuset-avoid-changing-cpusets-mems-when-errno-returned.patch
cpuset-remove-struct-cpuset_hotplug_scanner.patch
cpusets-allow-cpusets-to-be-configured-built-on-non-smp-systems.patch
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