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Date: Tue, 22 Mar 2011 16:08:55 -0700 From: Justin TerAvest <teravest@...gle.com> To: vgoyal@...hat.com, jaxboe@...ionio.com Cc: m-ikeda@...jp.nec.com, ryov@...inux.co.jp, taka@...inux.co.jp, kamezawa.hiroyu@...fujitsu.com, righi.andrea@...il.com, guijianfeng@...fujitsu.com, balbir@...ux.vnet.ibm.com, ctalbott@...gle.com, linux-kernel@...r.kernel.org, Justin TerAvest <teravest@...gle.com> Subject: [PATCH v2 8/8] cfq: Don't allow preemption across cgroups Previously, a sync queue in can preempt an async queue in another cgroup. This changes that behavior to disallow such preemption. Signed-off-by: Justin TerAvest <teravest@...gle.com> --- block/cfq-iosched.c | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-) diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index 23caa79..0d0189b 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -3430,6 +3430,9 @@ cfq_should_preempt(struct cfq_data *cfqd, struct cfq_queue *new_cfqq, if (!cfqq) return false; + if (new_cfqq->cfqg != cfqq->cfqg) + return false; + if (cfq_class_idle(new_cfqq)) return false; @@ -3449,9 +3452,6 @@ cfq_should_preempt(struct cfq_data *cfqd, struct cfq_queue *new_cfqq, if (rq_is_sync(rq) && !cfq_cfqq_sync(cfqq)) return true; - if (new_cfqq->cfqg != cfqq->cfqg) - return false; - if (cfq_slice_used(cfqq)) return true; -- 1.7.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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