linux/block
Aaron Carroll 6f5d8aa638 Deadline iosched: Fix batching fairness
After switching data directions, deadline always starts the next batch
from the lowest-sector request.  This gives excessive deadline expiries
and large latency and throughput disparity between high- and low-sector
requests; an order of magnitude in some tests.

This patch changes the batching behaviour so new batches start from the
request whose expiry is earliest.

Signed-off-by: Aaron Carroll <aaronc@gelato.unsw.edu.au>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-11-02 08:47:25 +01:00
..
as-iosched.c [BLOCK] Get rid of request_queue_t typedef 2007-07-24 09:28:11 +02:00
blktrace.c Convert cpu_sibling_map to be a per cpu variable 2007-10-16 09:42:50 -07:00
bsg.c bsg: mark struct file_operations const 2007-10-16 09:59:54 +02:00
cfq-iosched.c cfq_get_queue: fix possible NULL pointer access 2007-10-29 11:33:05 +01:00
compat_ioctl.c compat_ioctl: fix block device compat ioctl regression 2007-10-29 11:33:06 +01:00
deadline-iosched.c Deadline iosched: Fix batching fairness 2007-11-02 08:47:25 +01:00
elevator.c fix typo "insted" -> "instead" 2007-10-20 01:55:04 +02:00
genhd.c Driver core: change add_uevent_var to use a struct 2007-10-12 14:51:01 -07:00
ioctl.c compat_ioctl: move common block ioctls to compat_blkdev_ioctl 2007-10-10 09:26:00 +02:00
Kconfig Only enable BLOCK_COMPAT if COMPAT is needed 2007-10-12 17:58:36 -07:00
Kconfig.iosched
ll_rw_blk.c [BLOCK] Fix bad sharing of tag busy list on queues with shared tag maps 2007-10-29 11:33:06 +01:00
Makefile [BLOCK] Only include the compat ioctl code if CONFIG_BLOCK is set 2007-10-12 12:50:41 +02:00
noop-iosched.c [BLOCK] Get rid of request_queue_t typedef 2007-07-24 09:28:11 +02:00
scsi_ioctl.c [BLOCK] Get rid of request_queue_t typedef 2007-07-24 09:28:11 +02:00