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cfq: fix IOPRIO_CLASS_IDLE accounting

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Spotted by Nick <gentuu@gmail.com>, hopefully can explain the second trace in
http://bugzilla.kernel.org/show_bug.cgi?id=9180.

If ->async_idle_cfqq != NULL cfq_put_async_queues() puts it IOPRIO_BE_NR times
in a loop. Fix this.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Oleg Nesterov 2007-11-05 08:58:05 +01:00 committed by Jens Axboe
parent dbeeb816e8
commit 2389d1ef17
1 changed files with 3 additions and 2 deletions
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5
block/cfq-iosched.c
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@ -2068,9 +2068,10 @@ static void cfq_put_async_queues(struct cfq_data *cfqd)
cfq_put_queue(cfqd->async_cfqq[0][i]);
if (cfqd->async_cfqq[1][i])
cfq_put_queue(cfqd->async_cfqq[1][i]);
if (cfqd->async_idle_cfqq)
cfq_put_queue(cfqd->async_idle_cfqq);
}
if (cfqd->async_idle_cfqq)
cfq_put_queue(cfqd->async_idle_cfqq);
}
static void cfq_exit_queue(elevator_t *e)