sched: Check sched_domain before computing group power

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After commit 863bffc808 ("sched/fair: Fix group power_orig
computation"), we can dereference rq->sd before it is set.

Fix this by falling back to power_of() in this case and add a comment
explaining things.

Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
[ Added comment and tweaked patch. ]
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: mikey@neuling.org
Link: http://lkml.kernel.org/r/20131113151718.GN21461@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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Srikar Dronamraju 2013-11-12 22:11:26 +05:30 • committed by Ingo Molnar

parent 7486d6da09

commit 9abf24d465

1 changed files with 24 additions and 3 deletions

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kernel/sched/fair.c

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