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authorJens Axboe <jens.axboe@oracle.com>2009-08-11 08:26:11 +0200
committerJens Axboe <jens.axboe@oracle.com>2009-09-11 14:33:32 +0200
commit1b379d8daf4e981b2220f057683e35af022d45bc (patch)
treecc8e704bc9248c750375b23576d4659bbdc1322d /block/cfq-iosched.c
parenta33dac26d42d6f156b3b05a929961bd8d904f6e2 (diff)
downloadlwn-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/cfq-iosched.c')
-rw-r--r--block/cfq-iosched.c6
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);