tree b27ed41b74eb7e69d2e6b02cc659c4fab3ef12ef
parent 6663050edd9c2e8b1e1f55c09459144d84c045f0
author Paul Turner <pjt@google.com> 1295671499 -0800
committer Ingo Molnar <mingo@elte.hu> 1296041461 +0100

sched: Fix sign under-flows in wake_affine

While care is taken around the zero-point in effective_load to not exceed
the instantaneous rq->weight, it's still possible (e.g. using wake_idx != 0)
for (load + effective_load) to underflow.

In this case the comparing the unsigned values can result in incorrect balanced
decisions.

Signed-off-by: Paul Turner <pjt@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20110122044851.734245014@google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>