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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as-iosched.c	percpu: clean up percpu variable definitions	2009-06-24 15:13:48 +09:00
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	block: don't set REQ_NOMERGE unnecessarily	2009-04-28 07:37:33 +02:00
blk-integrity.c	block: fix improper kobject release in blk_integrity_unregister	2009-07-28 09:11:14 +02:00
blk-ioc.c	block: prevent possible io_context->refcount overflow	2009-06-10 23:07:15 +02:00
blk-iopoll.c	block: use interrupts disabled version of raise_softirq_irqoff()	2009-09-11 14:33:32 +02:00
blk-map.c	block: Use accessor functions for queue limits	2009-05-22 23:22:54 +02:00
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	generic-ipi: remove CSD_FLAG_WAIT	2009-02-25 14:13:44 +01:00
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	block: clean up misc stuff after block layer timeout conversion	2009-04-28 07:37:34 +02:00
blk.h	block: implement mixed merge of different failfast requests	2009-09-11 14:33:30 +02:00
bsg.c	Driver-Core: extend devnode callbacks to provide permissions	2009-09-19 12:50:38 -07:00
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	block: convert to pos and nr_sectors accessors	2009-05-11 09:50:54 +02:00
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
Kconfig	Make SCSI SG v4 driver enabled by default and remove EXPERIMENTAL dependency, since udev depends on BSG	2009-08-04 22:10:17 +02:00
Kconfig.iosched	update I/O sched Kconfig help texts - CFQ is now default, not AS.	2007-02-17 20:08:22 +01:00
Makefile	block: add blk-iopoll, a NAPI like approach for block devices	2009-09-11 14:33:31 +02:00
noop-iosched.c	block: get rid of elevator_t typedef	2008-12-29 08:29:50 +01:00
scsi_ioctl.c	block: call blk_scsi_ioctl_init()	2009-07-10 20:31:53 +02:00