sched/fair: Track cgroup depth

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Track depth in cgroup tree, this is useful for things like
find_matching_se() where you need to get to a common parent of two
sched entities.

Keeping the depth avoids having to calculate it on the spot, which
saves a number of possible cache-misses.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1328936700.2476.17.camel@laptop
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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Peter Zijlstra 2012-02-11 06:05:00 +01:00 • committed by Ingo Molnar

parent 3c4017c13f

commit fed14d45f9

2 changed files with 22 additions and 26 deletions

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1

include/linux/sched.h

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47

kernel/sched/fair.c

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