Mark McLoughlin 6cafb12dc8 block: silently error unsupported empty barriers too ... With 2.6.32-rc5 in a KVM guest using dm and virtio_blk, we see the following errors: end_request: I/O error, dev vda, sector 0 end_request: I/O error, dev vda, sector 0 The errors go away if dm stops submitting empty barriers, by reverting: commit 52b1fd5a27 Author: Mikulas Patocka <mpatocka@redhat.com> dm: send empty barriers to targets in dm_flush We should silently error all barriers, even empty barriers, on devices like virtio_blk which don't support them. See also: https://bugzilla.redhat.com/514901 Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Acked-by: Alasdair G Kergon <agk@redhat.com> Acked-by: Mikulas Patocka <mpatocka@redhat.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Neil Brown <neilb@suse.de> Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>		2009-10-24 14:14:31 +02:00
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Kconfig	…
Kconfig.iosched	…
Makefile	…
as-iosched.c	…
blk-barrier.c	block: allow large discard requests	2009-10-01 21:19:34 +02:00
blk-core.c	block: silently error unsupported empty barriers too	2009-10-24 14:14:31 +02:00
blk-exec.c	…
blk-integrity.c	…
blk-ioc.c	…
blk-iopoll.c	…
blk-map.c	…
blk-merge.c	block: Seperate read and write statistics of in_flight requests v2	2009-10-06 20:16:55 +02:00
blk-settings.c	blk-settings: fix function parameter kernel-doc notation	2009-10-12 08:20:47 +02:00
blk-softirq.c	…
blk-sysfs.c	Add missing blk_trace_remove_sysfs to be in pair with blk_trace_init_sysfs	2009-10-01 21:15:46 +02:00
blk-tag.c	block: use proper BLK_RW_ASYNC in blk_queue_start_tag()	2009-10-06 20:19:02 +02:00
blk-timeout.c	…
blk.h	…
bsg.c	…
cfq-iosched.c	cfq-iosched: avoid probable slice overrun when idling	2009-10-08 08:43:32 +02:00
compat_ioctl.c	block: Topology ioctls	2009-10-03 20:52:01 +02:00
deadline-iosched.c	…
elevator.c	elv_iosched_store(): fix strstrip() misuse	2009-10-09 08:48:08 +02:00
genhd.c	block: Seperate read and write statistics of in_flight requests v2	2009-10-06 20:16:55 +02:00
ioctl.c	block: Topology ioctls	2009-10-03 20:52:01 +02:00
noop-iosched.c	…
scsi_ioctl.c	…