linux-stable.git/include/linux/elevator.h, branch linux-2.6.17.y

[PATCH] elevator switching race

2006-06-08T22:14:23+00:00

There's a race between shutting down one io scheduler and firing up the
next, in which a new io could enter and cause the io scheduler to be
invoked with bad or NULL data.

To fix this, we need to maintain the queue lock for a bit longer.
Unfortunately we cannot do that, since the elevator init requires to be
run without the lock held.  This isn't easily fixable, without also
changing the mempool API.  So split the initialization into two parts,
and alloc-init operation and an attach operation.  Then we can
preallocate the io scheduler and related structures, and run the attach
inside the lock after we detach the old one.

This patch has survived 30 minutes of 1 second io scheduler switching
with a very busy io load.

Signed-off-by: Jens Axboe 
Signed-off-by: Linus Torvalds

[PATCH] fix rmmod problems with elevator attributes, clean them up

2006-03-19T03:27:18+00:00

[PATCH] elevator_t lifetime rules and sysfs fixes

2006-03-18T23:35:43+00:00

[PATCH] stop elv_unregister() from rogering other iosched's data, fix locking

2006-03-18T23:34:12+00:00

Signed-off-by: Al Viro

[PATCH] block: implement elv_insert and use it (fix ordcolor flipping bug)

2006-02-08T15:52:58+00:00

q->ordcolor must only be flipped on initial queueing of a hardbarrier
request.

Constructing ordered sequence and requeueing used to pass through
__elv_add_request() which flips q->ordcolor when it sees a barrier
request.

This patch separates out elv_insert() from __elv_add_request() and uses
elv_insert() when constructing ordered sequence and requeueing.
elv_insert() inserts the given request at the specified position and
does nothing else.

Signed-off-by: Tejun Heo 
Acked-by: Jens Axboe 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

s/assoicated/associated/

2006-01-09T23:09:36+00:00

Signed-off-by: Adrian Bunk

make elv_try_merge() static, kill the dead declaration of

2006-01-09T13:44:15+00:00

elv_try_last_merge().

Signed-off-by: Coywolf Qi Hunt 
Signed-off-by: Jens Axboe

[BLOCK] reimplement handling of barrier request

2006-01-06T08:51:03+00:00

Reimplement handling of barrier requests.

* Flexible handling to deal with various capabilities of
  target devices.
* Retry support for falling back.
* Tagged queues which don't support ordered tag can do ordered.

Signed-off-by: Tejun Heo 
Signed-off-by: Jens Axboe

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

2005-10-28T15:53:49+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