initial srpm import

1 files changed, 48 insertions, 0 deletions

diff --git a/linux-2.6-block-silently-error-unsupported-empty-barriers-too.patch b/linux-2.6-block-silently-error-unsupported-empty-barriers-too.patch
new file mode 100644
index 0000000..e6ab893
--- /dev/null
+++ b/linux-2.6-block-silently-error-unsupported-empty-barriers-too.patch
@@ -0,0 +1,48 @@
+From: Mark McLoughlin <markmc@redhat.com>
+Subject: [PATCH] block: silently error unsupported empty barriers too
+
+With 2.6.31-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 52b1fd5a27c625c78373e024bf570af3c9d44a79
+  Author: Mikulas Patocka <mpatocka@redhat.com>
+    dm: send empty barriers to targets in dm_flush
+
+We should 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>
+Cc: Rusty Russell <rusty@rustcorp.com.au>
+Cc: Mikulas Patocka <mpatocka@redhat.com>
+Cc: Alasdair G Kergon <agk@redhat.com>
+Cc: Neil Brown <neilb@suse.de>
+---
+ block/blk-core.c |    3 +--
+ 1 files changed, 1 insertions(+), 2 deletions(-)
+
+diff --git a/block/blk-core.c b/block/blk-core.c
+index e3299a7..35ad2bb 100644
+--- a/block/blk-core.c
++++ b/block/blk-core.c
+@@ -1163,8 +1163,7 @@ static int __make_request(struct request_queue *q, struct bio *bio)
+ 	const int unplug = bio_unplug(bio);
+ 	int rw_flags;
+ 
+-	if (bio_barrier(bio) && bio_has_data(bio) &&
+-	    (q->next_ordered == QUEUE_ORDERED_NONE)) {
++	if (bio_barrier(bio) && (q->next_ordered == QUEUE_ORDERED_NONE)) {
+ 		bio_endio(bio, -EOPNOTSUPP);
+ 		return 0;
+ 	}
+-- 
+1.6.4
+