Commit 66ae2919 authored Dec 15, 2009 by Gui Jianfeng Committed by Jens Axboe Dec 15, 2009

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@cn.fujitsu.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

parent 82bbbf28

block/cfq-iosched.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -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);
		}