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Jens Axboe da77526502 [PATCH] cfq-iosched: don't allow sync merges across queues 
Currently we allow any merge, even if the io originates from different
processes. This can cause really bad starvation and unfairness, if those
ios happen to be synchronous (reads or direct writes).

So add a allow_merge hook to the io scheduler ops, so an io scheduler can
help decide whether a bio/process combination may be merged with an
existing request.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2006-12-20 11:04:12 +01:00
..
as-iosched.c [PATCH] Allow as-iosched to be unloaded 2006-12-13 13:25:18 +01:00
blktrace.c [PATCH] Allow NULL pointers in percpu_free 2006-12-07 08:39:22 -08:00
cfq-iosched.c [PATCH] cfq-iosched: don't allow sync merges across queues 2006-12-20 11:04:12 +01:00
deadline-iosched.c [BLOCK] Cleanup unused variable passing 2006-12-01 10:42:33 +01:00
elevator.c [PATCH] cfq-iosched: don't allow sync merges across queues 2006-12-20 11:04:12 +01:00
genhd.c [PATCH] fault-injection capability for disk IO 2006-12-08 08:29:02 -08:00
ioctl.c [PATCH] struct path: convert block 2006-12-08 08:28:44 -08:00
Kconfig [PATCH] Centralise definitions of sector_t and blkcnt_t 2006-12-04 19:41:15 -08:00
Kconfig.iosched [PATCH] BLOCK: Make it possible to disable the block layer [try #6] 2006-09-30 20:52:31 +02:00
ll_rw_blk.c [PATCH] Fixup blk_rq_unmap_user() API 2006-12-19 11:12:46 +01:00
Makefile [PATCH] BLOCK: Make it possible to disable the block layer [try #6] 2006-09-30 20:52:31 +02:00
noop-iosched.c [BLOCK] Cleanup unused variable passing 2006-12-01 10:42:33 +01:00
scsi_ioctl.c [PATCH] Fixup blk_rq_unmap_user() API 2006-12-19 11:12:46 +01:00