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[POWERPC] spufs: spu_find_victim may choose wrong victim 

Need to re-check priority after dropping lock.  Otherwise, a
more favored context may be preempted.

Signed-off-by: Luke Browning <lukebr@linux.vnet.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Luke Browning 2007-12-20 16:39:59 +09:00 committed by Paul Mackerras
parent 91569531d1
commit b192541b39
1 changed files with 2 additions and 2 deletions
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4
arch/powerpc/platforms/cell/spufs/sched.c
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@ -626,10 +626,10 @@ static struct spu *find_victim(struct spu_context *ctx)
}
spu = victim->spu;
if (!spu) {
if (!spu || victim->prio <= ctx->prio) {
/*
* This race can happen because we've dropped
* the active list mutex. No a problem, just
* the active list mutex. Not a problem, just
* restart the search.
*/
mutex_unlock(&victim->state_mutex);