Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=7bae49d498de87f0da0c20c67adaa278eac84566 Commit: 7bae49d498de87f0da0c20c67adaa278eac84566 Parent: 73a2bcb0edb9ffb0b007b3546b430e2c6e415eee Author: James Bottomley <[EMAIL PROTECTED]> AuthorDate: Mon Oct 29 21:18:11 2007 +0100 Committer: Ingo Molnar <[EMAIL PROTECTED]> CommitDate: Mon Oct 29 21:18:11 2007 +0100
sched: fix incorrect assumption that cpu 0 exists This patch: commit 9b5b77512dce239fa168183fa71896712232e95a Author: Srivatsa Vaddagiri <[EMAIL PROTECTED]> Date: Mon Oct 15 17:00:09 2007 +0200 sched: clean up code under CONFIG_FAIR_GROUP_SCHED Introduced an assumption of the existence of CPU0 via this line cfs_rq = tg->cfs_rq[0]; If you have no CPU0, that will be NULL. The fix seems to be just to take whatever cfs_rq queue comes out of the for_each_possible_cpu() loop, since they're all equally good for the destruction operation. Signed-off-by: James Bottomley <[EMAIL PROTECTED]> Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]> --- kernel/sched.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/sched.c b/kernel/sched.c index 74dbb40..235952b 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -7041,7 +7041,7 @@ static void free_sched_group(struct rcu_head *rhp) /* Destroy runqueue etc associated with a task group */ void sched_destroy_group(struct task_group *tg) { - struct cfs_rq *cfs_rq; + struct cfs_rq *cfs_rq = NULL; int i; for_each_possible_cpu(i) { @@ -7049,7 +7049,7 @@ void sched_destroy_group(struct task_group *tg) list_del_rcu(&cfs_rq->leaf_cfs_rq_list); } - cfs_rq = tg->cfs_rq[0]; + BUG_ON(!cfs_rq); /* wait for possible concurrent references to cfs_rqs complete */ call_rcu(&cfs_rq->rcu, free_sched_group); - To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html