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authorAndrew Morton <akpm@osdl.org>2006-03-22 08:08:01 +0100
committerJens Axboe <axboe@nelson.home.kernel.dk>2006-03-27 09:29:02 +0200
commit4c5d0bbde9669cfb7f7fd4670dc9a117aea90384 (patch)
tree1c118a45803e81ab6bd1a049273b3971b46bb3cd /block/ll_rw_blk.c
parentb8fca1c7682105c843319728d8e37b42b19092bb (diff)
downloadop-kernel-dev-4c5d0bbde9669cfb7f7fd4670dc9a117aea90384.zip
op-kernel-dev-4c5d0bbde9669cfb7f7fd4670dc9a117aea90384.tar.gz
[PATCH] blk_execute_rq_nowait-speedup
Both elv_add_request() and generic_unplug_device() grab the queue lock and disable interrupts, do that locally and use the __ variants. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jens Axboe <axboe@suse.de>
Diffstat (limited to 'block/ll_rw_blk.c')
-rw-r--r--block/ll_rw_blk.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index b836b43..7fc903b 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -2477,10 +2477,12 @@ void blk_execute_rq_nowait(request_queue_t *q, struct gendisk *bd_disk,
rq->rq_disk = bd_disk;
rq->flags |= REQ_NOMERGE;
rq->end_io = done;
- elv_add_request(q, rq, where, 1);
- generic_unplug_device(q);
+ WARN_ON(irqs_disabled());
+ spin_lock_irq(q->queue_lock);
+ __elv_add_request(q, rq, where, 1);
+ __generic_unplug_device(q);
+ spin_unlock_irq(q->queue_lock);
}
-
EXPORT_SYMBOL_GPL(blk_execute_rq_nowait);
/**
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