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authorDivyesh Shah <dpshah@google.com>2010-04-01 15:01:41 -0700
committerJens Axboe <jens.axboe@oracle.com>2010-04-02 08:44:37 +0200
commit9195291e5f05e01d67f9a09c756b8aca8f009089 (patch)
treee46a151fe39be2bc23d0683bedb2cbefe916fb5b /block/blk-core.c
parent303a3acb2362f16c7e7f4c53b40c2f4b396dc8d5 (diff)
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blkio: Increment the blkio cgroup stats for real now
We also add start_time_ns and io_start_time_ns fields to struct request here to record the time when a request is created and when it is dispatched to device. We use ns uints here as ms and jiffies are not very useful for non-rotational media. Signed-off-by: Divyesh Shah<dpshah@google.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/blk-core.c')
-rw-r--r--block/blk-core.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index 9fe174dc74d..1d94f15d7f0 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -127,6 +127,7 @@ void blk_rq_init(struct request_queue *q, struct request *rq)
rq->tag = -1;
rq->ref_count = 1;
rq->start_time = jiffies;
+ set_start_time_ns(rq);
}
EXPORT_SYMBOL(blk_rq_init);
@@ -1855,8 +1856,10 @@ void blk_dequeue_request(struct request *rq)
* and to it is freed is accounted as io that is in progress at
* the driver side.
*/
- if (blk_account_rq(rq))
+ if (blk_account_rq(rq)) {
q->in_flight[rq_is_sync(rq)]++;
+ set_io_start_time_ns(rq);
+ }
}
/**
@@ -2517,4 +2520,3 @@ int __init blk_dev_init(void)
return 0;
}
-