linux/drivers/block/aoe
Jeff Moyer 30e2bc08b2 Revert "block: remove artifical max_hw_sectors cap"
This reverts commit 34b48db66e.
That commit caused performance regressions for streaming I/O
workloads on a number of different storage devices, from
SATA disks to external RAID arrays.  It also managed to
trip up some buggy firmware in at least one drive, causing
data corruption.

The next patch will bump the default max_sectors_kb value to
1280, which will accommodate a 10-data-disk stripe write
with chunk size 128k.  In the testing I've done using iozone,
fio, and aio-stress, a value of 1280 does not show a big
performance difference from 512.  This will hopefully still
help the software RAID setup that Christoph saw the original
performance gains with while still not regressing other
storage configurations.

Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
2015-08-18 13:21:13 -07:00
..
aoe.h aoe: Convert to immutable biovecs 2013-11-23 22:33:52 -08:00
aoeblk.c Revert "block: remove artifical max_hw_sectors cap" 2015-08-18 13:21:13 -07:00
aoechr.c aoe: replace kmalloc and then memcpy with kmemdup 2013-04-30 17:04:08 -07:00
aoecmd.c block: add a bi_error field to struct bio 2015-07-29 08:55:15 -06:00
aoedev.c block: add a bi_error field to struct bio 2015-07-29 08:55:15 -06:00
aoemain.c aoe: whitespace cleanup 2012-12-17 17:15:24 -08:00
aoenet.c aoe: update copyright date 2013-07-03 16:08:05 -07:00
Makefile