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authorPeter Zijlstra <peterz@infradead.org>2016-01-21 22:24:16 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-11-10 07:41:35 -0800
commit137b1ce318f0bd9847f68520cfd68c24e79ea258 (patch)
treeacb856e2e01cc09cd9975f1ef0706a39196c35bd /fs/btrfs/disk-io.c
parent53025e7f5667cc7b5915ead628867fd1db983a76 (diff)
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sched/cgroup: Fix cgroup entity load tracking tear-down
[ Upstream commit 6fe1f348b3dd1f700f9630562b7d38afd6949568 ] When a cgroup's CPU runqueue is destroyed, it should remove its remaining load accounting from its parent cgroup. The current site for doing so it unsuited because its far too late and unordered against other cgroup removal (->css_free() will be, but we're also in an RCU callback). Put it in the ->css_offline() callback, which is the start of cgroup destruction, right after the group has been made unavailable to userspace. The ->css_offline() callbacks are called in hierarchical order after the following v4.4 commit: aa226ff4a1ce ("cgroup: make sure a parent css isn't offlined before its children") Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Li Zefan <lizefan@huawei.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160121212416.GL6357@twins.programming.kicks-ass.net Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs/btrfs/disk-io.c')
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