diff options
| author | David Woodhouse <dwmw2@infradead.org> | 2006-05-24 09:22:21 +0100 |
|---|---|---|
| committer | David Woodhouse <dwmw2@infradead.org> | 2006-05-24 09:22:21 +0100 |
| commit | 66643de455c27973ac31ad6de9f859d399916842 (patch) | |
| tree | 7ebed7f051879007d4b11d6aaa9e65a1bcb0b08f /block/elevator.c | |
| parent | 2c23d62abb820e19c54012520f08a198c2233a85 (diff) | |
| parent | 387e2b0439026aa738a9edca15a57e5c0bcb4dfc (diff) | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
include/asm-powerpc/unistd.h
include/asm-sparc/unistd.h
include/asm-sparc64/unistd.h
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'block/elevator.c')
| -rw-r--r-- | block/elevator.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/block/elevator.c b/block/elevator.c index 29825792cbd5..8768a367fdde 100644 --- a/block/elevator.c +++ b/block/elevator.c @@ -333,6 +333,7 @@ void elv_insert(request_queue_t *q, struct request *rq, int where) { struct list_head *pos; unsigned ordseq; + int unplug_it = 1; blk_add_trace_rq(q, rq, BLK_TA_INSERT); @@ -399,6 +400,11 @@ void elv_insert(request_queue_t *q, struct request *rq, int where) } list_add_tail(&rq->queuelist, pos); + /* + * most requeues happen because of a busy condition, don't + * force unplug of the queue for that case. + */ + unplug_it = 0; break; default: @@ -407,7 +413,7 @@ void elv_insert(request_queue_t *q, struct request *rq, int where) BUG(); } - if (blk_queue_plugged(q)) { + if (unplug_it && blk_queue_plugged(q)) { int nrq = q->rq.count[READ] + q->rq.count[WRITE] - q->in_flight; |