pm24.git/include/linux/blkdev.h, branch v2.6.15

[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

[PATCH] 01/05 Implement generic dispatch queue

2005-10-28T06:44:24Z

Implements generic dispatch queue which can replace all dispatch queues implemented by each iosched. This reduces code duplication, eases enforcing semantics over dispatch queue, and simplifies specific ioscheds. Signed-off-by: Tejun Heo Signed-off-by: Jens Axboe