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| author | Alan D. Brunelle <Alan.Brunelle@hp.com> | 2007-11-07 20:26:56 +0100 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2007-11-09 13:41:32 +0100 |
| commit | 2ad8b1ef11c98c5603580878aebf9f1bc74129e4 (patch) | |
| tree | f7bdc2484513f6ffd174b1385bb216dcf97d2c78 /block/ll_rw_blk.c | |
| parent | block: fix requeue handling in blk_queue_invalidate_tags() (diff) | |
| download | linux-2ad8b1ef11c98c5603580878aebf9f1bc74129e4.tar.xz linux-2ad8b1ef11c98c5603580878aebf9f1bc74129e4.zip | |
Add UNPLUG traces to all appropriate places
Added blk_unplug interface, allowing all invocations of unplugs to result
in a generated blktrace UNPLUG.
Signed-off-by: Alan D. Brunelle <Alan.Brunelle@hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/ll_rw_blk.c')
| -rw-r--r-- | block/ll_rw_blk.c | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c index 3d489915fd22..3b927be03850 100644 --- a/block/ll_rw_blk.c +++ b/block/ll_rw_blk.c @@ -1621,15 +1621,7 @@ static void blk_backing_dev_unplug(struct backing_dev_info *bdi, { struct request_queue *q = bdi->unplug_io_data; - /* - * devices don't necessarily have an ->unplug_fn defined - */ - if (q->unplug_fn) { - blk_add_trace_pdu_int(q, BLK_TA_UNPLUG_IO, NULL, - q->rq.count[READ] + q->rq.count[WRITE]); - - q->unplug_fn(q); - } + blk_unplug(q); } static void blk_unplug_work(struct work_struct *work) @@ -1653,6 +1645,20 @@ static void blk_unplug_timeout(unsigned long data) kblockd_schedule_work(&q->unplug_work); } +void blk_unplug(struct request_queue *q) +{ + /* + * devices don't necessarily have an ->unplug_fn defined + */ + if (q->unplug_fn) { + blk_add_trace_pdu_int(q, BLK_TA_UNPLUG_IO, NULL, + q->rq.count[READ] + q->rq.count[WRITE]); + + q->unplug_fn(q); + } +} +EXPORT_SYMBOL(blk_unplug); + /** * blk_start_queue - restart a previously stopped queue * @q: The &struct request_queue in question |