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Date: Tue, 15 Dec 2009 09:53:39 +0800 From: Gui Jianfeng <guijianfeng@...fujitsu.com> To: Corrado Zoccolo <czoccolo@...il.com>, Vivek Goyal <vgoyal@...hat.com>, Jens Axboe <jens.axboe@...cle.com> CC: linux kernel mailing list <linux-kernel@...r.kernel.org> Subject: [PATCH] cfq: set workload as expired if it doesn't have any slice left. When a group is resumed, if it doesn't have workload slice left, we should set workload_expires as expired. Otherwise, we might start from where we left in previous group by error. Thanks the idea from Corrado. Signed-off-by: Gui Jianfeng <guijianfeng@...fujitsu.com> --- block/cfq-iosched.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-) diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index f3f6239..e2f8046 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -2113,7 +2113,9 @@ static void cfq_choose_cfqg(struct cfq_data *cfqd) cfqd->workload_expires = jiffies + cfqg->saved_workload_slice; cfqd->serving_type = cfqg->saved_workload; cfqd->serving_prio = cfqg->saved_serving_prio; - } + } else + cfqd->workload_expires = jiffies - 1; + choose_service_tree(cfqd, cfqg); } -- 1.5.4.rc3 -- 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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