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| author | Divyesh Shah <dpshah@google.com> | 2010-04-01 15:01:41 -0700 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2010-04-02 08:44:37 +0200 |
| commit | 9195291e5f05e01d67f9a09c756b8aca8f009089 (patch) | |
| tree | e46a151fe39be2bc23d0683bedb2cbefe916fb5b /block/blk-core.c | |
| parent | 303a3acb2362f16c7e7f4c53b40c2f4b396dc8d5 (diff) | |
| download | lwn-9195291e5f05e01d67f9a09c756b8aca8f009089.tar.gz lwn-9195291e5f05e01d67f9a09c756b8aca8f009089.zip | |
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.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 9fe174dc74d1..1d94f15d7f0d 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; } - |