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| author | Jerome Marchand <jmarchan@redhat.com> | 2009-04-22 14:01:49 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-04-24 08:54:21 +0200 |
| commit | 42dad7647aec49b3ad20dd0cb832b232a6ae514f (patch) | |
| tree | b70d4cb7706f2647e65426e24f078ddf14d6e139 /block/blk-sysfs.c | |
| parent | 097102c2d04974bdfcfa16a5f3062d499842139c (diff) | |
| download | kernel_samsung_smdk4412-42dad7647aec49b3ad20dd0cb832b232a6ae514f.zip kernel_samsung_smdk4412-42dad7647aec49b3ad20dd0cb832b232a6ae514f.tar.gz kernel_samsung_smdk4412-42dad7647aec49b3ad20dd0cb832b232a6ae514f.tar.bz2 | |
block: simplify I/O stat accounting
This simplifies I/O stat accounting switching code and separates it
completely from I/O scheduler switch code.
Requests are accounted according to the state of their request queue
at the time of the request allocation. There is no need anymore to
flush the request queue when switching I/O accounting state.
Signed-off-by: Jerome Marchand <jmarchan@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/blk-sysfs.c')
| -rw-r--r-- | block/blk-sysfs.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index cac4e9f..3ff9bba 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -209,14 +209,10 @@ static ssize_t queue_iostats_store(struct request_queue *q, const char *page, ssize_t ret = queue_var_store(&stats, page, count); spin_lock_irq(q->queue_lock); - elv_quiesce_start(q); - if (stats) queue_flag_set(QUEUE_FLAG_IO_STAT, q); else queue_flag_clear(QUEUE_FLAG_IO_STAT, q); - - elv_quiesce_end(q); spin_unlock_irq(q->queue_lock); return ret; |