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| author | Vivek Goyal <vgoyal@redhat.com> | 2009-07-09 22:13:16 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@carl.(none)> | 2009-07-10 20:31:54 +0200 |
| commit | 32f2e807a3938b24d0831211e6094f9e44b2fc83 (patch) | |
| tree | 80baac86022bc36bc07a787008642149fa205642 | |
| parent | ecb554a846f8e9d2a58f6d6c118168a63ac065aa (diff) | |
| download | op-kernel-dev-32f2e807a3938b24d0831211e6094f9e44b2fc83.zip op-kernel-dev-32f2e807a3938b24d0831211e6094f9e44b2fc83.tar.gz | |
cfq-iosched: reset oom_cfqq in cfq_set_request()
In case memory is scarce, we now default to oom_cfqq. Once memory is
available again, we should allocate a new cfqq and stop using oom_cfqq for
a particular io context.
Once a new request comes in, check if we are using oom_cfqq, and if yes,
try to allocate a new cfqq.
Tested the patch by forcing the use of oom_cfqq and upon next request thread
realized that it was using oom_cfqq and it allocated a new cfqq.
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| -rw-r--r-- | block/cfq-iosched.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index 87276eb..fd7080e 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -2311,7 +2311,7 @@ cfq_set_request(struct request_queue *q, struct request *rq, gfp_t gfp_mask) goto queue_fail; cfqq = cic_to_cfqq(cic, is_sync); - if (!cfqq) { + if (!cfqq || cfqq == &cfqd->oom_cfqq) { cfqq = cfq_get_queue(cfqd, is_sync, cic->ioc, gfp_mask); cic_set_cfqq(cic, cfqq, is_sync); } |
