Commit ff7d145f authored by Jens Axboe's avatar Jens Axboe Committed by Jens Axboe
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[PATCH] Add one more pointer to struct request for IO scheduler usage 



Then we have enough room in the request to get rid of the dynamic
allocations in CFQ/AS.

Signed-off-by: default avatarJens Axboe <axboe@suse.de>
parent 5380a101

include/linux/blkdev.h

+6 −0
Original line number Diff line number Diff line
@@ -232,7 +232,13 @@ struct request { 
	struct hlist_node hash;	/* merge hash */

	struct rb_node rb_node;	/* sort/lookup */



	/*

	 * two pointers are available for the IO schedulers, if they need

	 * more they have to dynamically allocate it.

	 */

	void *elevator_private;

	void *elevator_private2;



	void *completion_data;



	int rq_status;	/* should split this into a few status bits */