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block, cfq: move cfqd->cic_index to q->id

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cfq allocates per-queue id using ida and uses it to index cic radix
tree from io_context.  Move it to q->id and allocate on queue init and
free on queue release.  This simplifies cfq a bit and will allow for
further improvements of io context life-cycle management.

This patch doesn't introduce any functional difference.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Tejun Heo 2011-12-14 00:33:37 +01:00 • committed by Jens Axboe
parent 8ba61435d7
commit a73f730d01
5 changed files with 32 additions and 55 deletions
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6
include/linux/blkdev.h
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@ -310,6 +310,12 @@ struct request_queue {
*/
unsigned long queue_flags;
/*
* ida allocated id for this queue. Used to index queues from
* ioctx.
*/
int id;
/*
* queue needs bounce pages for pages above this limit
*/