linux/block, branch v2.6.15.1

[PATCH] block: Cleanup CDROMEJECT ioctl

2005-12-20T00:47:50Z

This is just a basic cleanup. No change in functionality. Signed-off-by: Ben Collins Signed-off-by: Linus Torvalds

[PATCH] as-iosched: remove state assertion in as_add_request()

2005-11-21T19:04:52Z

Kill the arq->state poison statement in as_add_request(), it can trigger for perfectly valid code that just reuses a request after io completion instead of freeing it and allocating a new one. We probably should introduce a blk_init_request() to start from scratch, but for now just kill it as we will be removing the as specific poisoning soon. Signed-off-by: Jens Axboe Signed-off-by: Linus Torvalds

[BLOCK] new block/ directory comment tidy

2005-11-18T20:59:31Z

Some leftover comments referring to drivers/block that are now block/. They don't add any information we don't already have, so kill them. Signed-off-by: Coywolf Qi Hunt Signed-off-by: Jens Axboe

[BLOCK] elevator: elv_latter/former_request update

2005-11-12T09:57:05Z

With generic dispatch queue update, implicit former/latter request handling using rq->queuelist.prev/next doesn't work as expected anymore. Also, the only iosched dependent on this feature was noop-iosched and it has been reimplemented to have its own latter/former methods. This patch removes implicit former/latter handling. Signed-off-by: Tejun Heo Signed-off-by: Jens Axboe

[BLOCK] noop-iosched: reimplementation of request dispatching

2005-11-12T09:56:52Z

The original implementation directly used dispatch queue. As new generic dispatch queue imposes stricter rules over ioscheds and dispatch queue usage, this direct use becomes somewhat problematic. This patch reimplements noop-iosched such that it complies to generic iosched model better. Request merging with q->last_merge and rq->queuelist.prev/next work again now. Signed-off-by: Tejun Heo Signed-off-by: Jens Axboe

[BLOCK] cfq-iosched: fix slice_left calculation

2005-11-12T09:56:36Z

When cfq slice expires, remainder of slice is calculated and stored in cfqq->slice_left. Current code calculates the opposite of remainder - how many jiffies the cfqq has used past slice end. This patch fixes the bug. Signed-off-by: Tejun Heo Signed-off-by: Jens Axboe

[BLOCK] fix string handling in elv_iosched_store

2005-11-12T09:56:21Z

elv_iosched_store doesn't terminate string passed from userspace if it's too long. Also, if the written length is zero (probably not possible), it accesses elevator_name[-1]. This patch fixes both bugs. Signed-off-by: Tejun Heo Signed-off-by: Jens Axboe

[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

[BLOCK] cfq-iosched: cfq forced dispatching fix

2005-11-12T09:55:51Z

cfq forced dispatching might not return all requests on the queue. This bug can hang elevator switchinig and corrupt request ordering during flush sequence. Signed-off-by: Tejun Heo Signed-off-by: Jens Axboe

[BLOCK] elevator: run queue in elevator_switch

2005-11-12T09:55:37Z

elevator_dispatch needs to run queue after forced dispatching; otherwise, the queue might stall. Signed-off-by: Tejun Heo Signed-off-by: Jens Axboe