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

[SCSI] unify SCSI_IOCTL_SEND_COMMAND implementations

2006-04-13T15:13:15+00:00

We currently have two implementations of this obsolete ioctl, one in
the block layer and one in the scsi code.  Both of them have drawbacks.

This patch kills the scsi layer version after updating the block version
with the missing bits:

 - argument checking
 - use scatterlist I/O
 - set number of retries based on the submitted command

This is the last user of non-S/G I/O except for the gdth driver, so
getting this in ASAP and through the scsi tree would be nie to kill
the non-S/G I/O path.  Jens, what do you think about adding a check
for non-S/G I/O in the midlayer?

Thanks to  Or Gerlitz for testing this patch.

Signed-off-by: Christoph Hellwig 
Signed-off-by: James Bottomley

[BLOCK] cfq-iosched: seek and async performance fixes

2006-03-28T11:03:44+00:00

Detect whether a given process is seeky and if so disable (mostly) the
idle window if it is. We still allow just a little idle time, just enough
to allow that process to submit a new request. That is needed to maintain
fairness across priority groups.

In some cases, we could setup several async queues. This is not optimal
from a performance POV, since we want all async io in one queue to perform
good sorting on it. It also impacted sync queues, as async io got too much
slice time.

Signed-off-by: Jens Axboe

[PATCH] [BLOCK] cfq-iosched: change cfq io context linking from list to tree

2006-03-28T06:59:01+00:00

On setups with many disks, we spend a considerable amount of time
looking up the process-disk mapping on each queue of io. Testing with
a NULL based block driver, this costs 40-50% reduction in throughput
for 1000 disks.

Signed-off-by: Jens Axboe

[PATCH] Block queue IO tracing support (blktrace) as of 2006-03-23

2006-03-23T19:00:26+00:00

Signed-off-by: Jens Axboe

[PATCH] fix sysfs interaction and lifetime rules handling for queues

2006-03-18T23:34:37+00:00

[PATCH] make cfq_exit_queue() prune the cfq_io_context for that queue

2006-03-18T23:34:07+00:00

Signed-off-by: Al Viro

[PATCH] keep sync and async cfq_queue separate

2006-03-18T23:34:02+00:00

Signed-off-by: Al Viro

[BLOCK] ll_rw_blk: make max_sectors and max_hw_sectors unsigned ints

2006-01-24T09:06:19+00:00

IDE lba48 can support full 64k request size, which overflows the
max_hw_sectors variable.

Signed-off-by: Jens Axboe

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

2006-01-09T17:26:40+00:00

Manual merge for trivial #include changes

[BLOCK] ll_rw_blk: Enable out-of-order request completions through softirq

2006-01-09T15:02:34+00:00

Request completion can be a quite heavy process, since it needs to
iterate through the entire request and complete the bio's it holds.
This patch adds blk_complete_request() which moves this processing
into a dedicated block softirq.

Signed-off-by: Jens Axboe