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author | Kiyoshi Ueda <k-ueda@ct.jp.nec.com> | 2009-05-27 14:50:02 +0200 |
---|---|---|
committer | Jens Axboe <jens.axboe@oracle.com> | 2009-05-27 14:50:02 +0200 |
commit | 3c4198e874cde694f5ea1463706873e7907bdb18 (patch) | |
tree | 2315e8e86996c98ddfa74059dc61255317bef0eb /block | |
parent | ba396a6c104682dfe5c8b4fbbf5974d5ac9f3687 (diff) | |
download | kernel_samsung_tuna-3c4198e874cde694f5ea1463706873e7907bdb18.zip kernel_samsung_tuna-3c4198e874cde694f5ea1463706873e7907bdb18.tar.gz kernel_samsung_tuna-3c4198e874cde694f5ea1463706873e7907bdb18.tar.bz2 |
block: fix no diskstat problem
The commit below in 2.6-block/for-2.6.31 causes no diskstat problem
because the blk_discard_rq() check was added with '&&'.
It should be 'blk_fs_request() || blk_discard_rq()'.
This patch does it and fixes the no diskstat problem.
Please review and apply.
------ /proc/diskstat without this patch -------------------------------------
8 0 sda 0 0 0 0 0 0 0 0 0 0 0
------------------------------------------------------------------------------
----- /proc/diskstat with this patch applied ---------------------------------
8 0 sda 4186 303 373621 61600 9578 3859 107468 169479 2 89755 231059
------------------------------------------------------------------------------
--------------------------------------------------------------------------
commit c69d48540c201394d08cb4d48b905e001313d9b8
Author: Jens Axboe <jens.axboe@oracle.com>
Date: Fri Apr 24 08:12:19 2009 +0200
block: include discard requests in IO accounting
We currently don't do merging on discard requests, but we potentially
could. If we do, then we need to include discard requests in the IO
accounting, or merging would end up decrementing in_flight IO counters
for an IO which never incremented them.
So enable accounting for discard requests.
<snip>
static inline int blk_do_io_stat(struct request *rq)
{
- return rq->rq_disk && blk_rq_io_stat(rq) && blk_fs_request(rq);
+ return rq->rq_disk && blk_rq_io_stat(rq) && blk_fs_request(rq) &&
+ blk_discard_rq(rq);
}
--------------------------------------------------------------------------
Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block')
-rw-r--r-- | block/blk.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/block/blk.h b/block/blk.h index c863ec2..3fae6ad 100644 --- a/block/blk.h +++ b/block/blk.h @@ -156,12 +156,12 @@ static inline int blk_cpu_to_group(int cpu) * * a) it's attached to a gendisk, and * b) the queue had IO stats enabled when this request was started, and - * c) it's a file system request + * c) it's a file system request or a discard request */ static inline int blk_do_io_stat(struct request *rq) { - return rq->rq_disk && blk_rq_io_stat(rq) && blk_fs_request(rq) && - blk_discard_rq(rq); + return rq->rq_disk && blk_rq_io_stat(rq) && + (blk_fs_request(rq) || blk_discard_rq(rq)); } #endif |