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| author | Jens Axboe <jens.axboe@oracle.com> | 2009-08-11 08:26:11 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-09-11 14:33:32 +0200 |
| commit | 1b379d8daf4e981b2220f057683e35af022d45bc (patch) | |
| tree | cc8e704bc9248c750375b23576d4659bbdc1322d /block | |
| parent | a33dac26d42d6f156b3b05a929961bd8d904f6e2 (diff) | |
| download | lwn-1b379d8daf4e981b2220f057683e35af022d45bc.tar.gz lwn-1b379d8daf4e981b2220f057683e35af022d45bc.zip | |
cfq-iosched: get rid of must_alloc flag
It's not currently used, as pointed out by
Gui Jianfeng <guijianfeng@cn.fujitsu.com>. We already check the
wait_request flag to allow an idling queue priority allocation access,
so we don't need this extra flag.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/cfq-iosched.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index 9e6d0af6c990..f75a54bfc547 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -186,7 +186,6 @@ enum cfqq_state_flags { CFQ_CFQQ_FLAG_on_rr = 0, /* on round-robin busy list */ CFQ_CFQQ_FLAG_wait_request, /* waiting for a request */ CFQ_CFQQ_FLAG_must_dispatch, /* must be allowed a dispatch */ - CFQ_CFQQ_FLAG_must_alloc, /* must be allowed rq alloc */ CFQ_CFQQ_FLAG_must_alloc_slice, /* per-slice must_alloc flag */ CFQ_CFQQ_FLAG_fifo_expire, /* FIFO checked in this slice */ CFQ_CFQQ_FLAG_idle_window, /* slice idling enabled */ @@ -213,7 +212,6 @@ static inline int cfq_cfqq_##name(const struct cfq_queue *cfqq) \ CFQ_CFQQ_FNS(on_rr); CFQ_CFQQ_FNS(wait_request); CFQ_CFQQ_FNS(must_dispatch); -CFQ_CFQQ_FNS(must_alloc); CFQ_CFQQ_FNS(must_alloc_slice); CFQ_CFQQ_FNS(fifo_expire); CFQ_CFQQ_FNS(idle_window); @@ -2218,8 +2216,7 @@ static void cfq_prio_boost(struct cfq_queue *cfqq) static inline int __cfq_may_queue(struct cfq_queue *cfqq) { - if ((cfq_cfqq_wait_request(cfqq) || cfq_cfqq_must_alloc(cfqq)) && - !cfq_cfqq_must_alloc_slice(cfqq)) { + if (cfq_cfqq_wait_request(cfqq) && !cfq_cfqq_must_alloc_slice(cfqq)) { cfq_mark_cfqq_must_alloc_slice(cfqq); return ELV_MQUEUE_MUST; } @@ -2306,7 +2303,6 @@ cfq_set_request(struct request_queue *q, struct request *rq, gfp_t gfp_mask) } cfqq->allocated[rw]++; - cfq_clear_cfqq_must_alloc(cfqq); atomic_inc(&cfqq->ref); spin_unlock_irqrestore(q->queue_lock, flags); |