Messages in this thread Patch in this message | | | Date | Wed, 27 Oct 2004 07:54:56 +0200 | From | Jens Axboe <> | Subject | [PATCH] cfq v2 switch bug |
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Hi,
Fix online switching issue with cfq v2. It does deferred clearing of e->elevator_data, which screws up the current io scheduler. It does not have to, so just remove it.
Signed-off-by: Jens Axboe <axboe@suse.de>
--- /opt/kernel/linux-2.6.9-mm1/drivers/block/cfq-iosched.c 2004-10-25 17:17:19.000000000 +0200 +++ linux-2.6.9-mm1/drivers/block/cfq-iosched.c 2004-10-26 15:07:51.146772400 +0200 @@ -1482,7 +1482,6 @@ static void cfq_put_cfqd(struct cfq_data *cfqd) { request_queue_t *q = cfqd->queue; - elevator_t *e = q->elevator; struct cfq_queue *cfqq; if (!atomic_dec_and_test(&cfqd->ref)) @@ -1500,7 +1499,6 @@ blk_put_queue(q); - e->elevator_data = NULL; mempool_destroy(cfqd->crq_pool); kfree(cfqd->crq_hash); kfree(cfqd->cfq_hash); -- Jens Axboe
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