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| author | Gui Jianfeng <guijianfeng@cn.fujitsu.com> | 2009-12-15 10:08:45 +0100 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-12-15 10:08:45 +0100 |
| commit | 66ae291978177d5c012015f12b8fbc76dc7d0965 (patch) | |
| tree | 1351d66beea2b0b2300a7491ca8d9ffb83578e34 /block/cfq-iosched.c | |
| parent | 82bbbf28db4beefcd8b897800153e21378270cd1 (diff) | |
| download | lwn-66ae291978177d5c012015f12b8fbc76dc7d0965.tar.gz lwn-66ae291978177d5c012015f12b8fbc76dc7d0965.zip | |
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>
Diffstat (limited to 'block/cfq-iosched.c')
| -rw-r--r-- | 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 f3f62394b986..e2f80463ed0d 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); } |