linux-toradex.git/drivers/block/elevator.c, branch master

[BLOCK] Move all core block layer code to new block/ directory

2005-11-04T07:43:35+00:00

drivers/block/ is right now a mix of core and driver parts. Lets move
the core parts to a new top level directory. Al will move the fs/
related block parts to block/ next.

Signed-off-by: Jens Axboe

[PATCH] blk: fix dangling pointer access in __elv_add_request

2005-11-02T05:58:06+00:00

cfq's add_req_fn callback may invoke q->request_fn directly and
depending on low-level driver used and timing, a queued request may be
finished & deallocated before add_req_fn callback returns.  So,
__elv_add_request must not access rq after it's passed to add_req_fn
callback.

This patch moves rq_mergeable test above add_req_fn().  This may
result in q->last_merge pointing to REQ_NOMERGE request if add_req_fn
callback sets it but as RQ_NOMERGE is checked again when blk layer
actually tries to merge requests, this does not cause any problem.

Signed-off-by: Tejun Heo 
Signed-off-by: Linus Torvalds

[PATCH] block cleanups: Fix iosched module refcount leak

2005-10-31T01:37:20+00:00

If the requested I/O scheduler is already in place, elevator_switch simply
leaves the queue alone, and returns.  However, it forgets to call
elevator_put, so

'echo [current_sched] > /sys/block/[dev]/queue/scheduler'

will leak a reference, causing the current_sched module to be permanently
pinned in memory.

Signed-off-by: Nate Diller 
Acked-by: Jens Axboe 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] block cleanups: Add kconfig default iosched submenu

2005-10-31T01:37:20+00:00

Add a kconfig submenu to select the default I/O scheduler, in case
anticipatory is not compiled in or another default is preferred.  Also,
since no-op is always available, we should use it whenever the selected
default is not.

Signed-off-by: Nate Diller 
Acked-by: Jens Axboe 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] cfq-iosched: move tasklist walk to elevator.c

2005-10-31T01:37:17+00:00

We're trying to get rid of as much as possible tasklist walks, or at
least moving them to core code.  This patch falls into the second
category.

Instead of walking the tasklist in cfq-iosched move that into
elv_unregister.  The added benefit is that with this change the as
ioscheduler might be might unloadable more easily aswell.

The new code uses read_lock instead of read_lock_irq because the
tasklist_lock only needs irq disabling for writers.

Signed-off-by: Christoph Hellwig 
Acked-by: Jens Axboe 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

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

2005-10-28T15:56:34+00:00

Manual fixup for trivial "gfp_t" changes.

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

2005-10-28T15:53:49+00:00

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

2005-10-28T15:53:00+00:00

[PATCH] gfp_t: block layer core

2005-10-28T15:16:47+00:00

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

[BLOCK] Leftover reference to ->max_back_kb

2005-10-28T07:01:17+00:00

Signed-off-by: Jens Axboe