kernel.git/include/linux/blkdev.h, branch linux-2.6.15.y

[PATCH] Kill blk_attempt_remerge()

2006-01-31T06:13:17Z

[BLOCK] Kill blk_attempt_remerge() It's a broken interface, it's done way too late. And apparently it triggers slab problems in recent kernels as well (most likely after the generic dispatch code was merged). So kill it, ide-cd is the only user of it. Signed-off-by: Jens Axboe chrisw: backport to 2.6.15 tree Signed-off-by: Chris Wright Signed-off-by: Greg Kroah-Hartman

[BLOCK] Implement elv_drain_elevator for improved switch error detection

2005-11-12T09:56:06Z

This patch adds request_queue->nr_sorted which keeps the number of requests in the iosched and implement elv_drain_elevator which performs forced dispatching. elv_drain_elevator checks whether iosched actually dispatches all requests it has and prints error message if it doesn't. As buggy forced dispatching can result in wrong barrier operations, I think this extra check is worthwhile. Signed-off-by: Tejun Heo Signed-off-by: Jens Axboe

Merge branch 'elevator-switch' of git://brick.kernel.dk/data/git/linux-2.6-block

2005-10-28T15:56:34Z

Manual fixup for trivial "gfp_t" changes.

Merge branch 'generic-dispatch' of git://brick.kernel.dk/data/git/linux-2.6-block

2005-10-28T15:53:49Z

[PATCH] gfp_t: block layer core

2005-10-28T15:16:47Z

Signed-off-by: Al Viro Signed-off-by: Linus Torvalds

[BLOCK] elevator switch fixes/cleanup

2005-10-28T06:48:23Z

- 100msec sleep is a little excessive, lots of requests can complete in that timeframe. Use 10msec instead. - Rename QUEUE_FLAG_BYPASS to QUEUE_FLAG_ELVSWITCH to indicate what is going on. Signed-off-by: Jens Axboe

[BLOCK] Reimplement elevator switch

2005-10-28T06:48:12Z

This patch reimplements elevator switch. This patch assumes generic dispatch queue patchset is applied. * Each request is tagged with REQ_ELVPRIV flag if it has its elevator private data set. * Requests which doesn't have REQ_ELVPRIV flag set never enter iosched. They are always directly back inserted to dispatch queue. Of course, elevator_put_req_fn is called only for requests which have its REQ_ELVPRIV set. * Request queue maintains the current number of requests which have its elevator data set (elevator_set_req_fn called) in q->rq->elvpriv. * If a request queue has QUEUE_FLAG_BYPASS set, elevator private data is not allocated for new requests. To switch to another iosched, we set QUEUE_FLAG_BYPASS and wait until elvpriv goes to zero; then, we attach the new iosched and clears QUEUE_FLAG_BYPASS. New implementation is much simpler and main code paths are less cluttered, IMHO. Signed-off-by: Tejun Heo Signed-off-by: Jens Axboe

[BLOCK] kill generic max_back_kb handling

2005-10-28T06:46:01Z

This patch kills max_back_kb handling from elv_dispatch_sort() and kills max_back_kb field from struct request_queue. Signed-off-by: Tejun Heo Signed-off-by: Jens Axboe

[PATCH] 03/05 move last_merge handlin into generic elevator code

2005-10-28T06:45:20Z

Currently, both generic elevator code and specific ioscheds participate in the management and usage of last_merge. This and the following patches move last_merge handling into generic elevator code. Signed-off-by: Tejun Heo Signed-off-by: Jens Axboe

[PATCH] generic dispatch fixes

2005-10-28T06:44:37Z

- Split elv_dispatch_insert() into two functions - Rename rq_last_sector() to rq_end_sector() Signed-off-by: Jens Axboe