diff options
author | Peter Lieven <pl@kamp.de> | 2016-05-30 13:31:13 +0200 |
---|---|---|
committer | Stefan Hajnoczi <stefanha@redhat.com> | 2016-06-07 14:40:51 +0100 |
commit | 117bc3fa22d359db6c4f0c10f34c8c9e00ed64af (patch) | |
tree | daebd01e11358993b50f6bef3406aab2461d2cd0 /tests/qemu-iotests/077 | |
parent | e3a4f91b4dda92666379e4865ea9847644f3bc19 (diff) | |
download | qemu-117bc3fa22d359db6c4f0c10f34c8c9e00ed64af.zip qemu-117bc3fa22d359db6c4f0c10f34c8c9e00ed64af.tar.gz qemu-117bc3fa22d359db6c4f0c10f34c8c9e00ed64af.tar.bz2 |
block/io: optimize bdrv_co_pwritev for small requests
in a read-modify-write cycle a small request might cause
head and tail to fall into the same aligned block. Currently
QEMU reads the same block twice in this case which is
not necessary.
Signed-off-by: Peter Lieven <pl@kamp.de>
Message-id: 1464607873-28206-1-git-send-email-pl@kamp.de
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'tests/qemu-iotests/077')
-rwxr-xr-x | tests/qemu-iotests/077 | 12 |
1 files changed, 1 insertions, 11 deletions
diff --git a/tests/qemu-iotests/077 b/tests/qemu-iotests/077 index 4dc680b..d2d2a2d 100755 --- a/tests/qemu-iotests/077 +++ b/tests/qemu-iotests/077 @@ -60,7 +60,7 @@ EOF # Sequential RMW requests on the same physical sector off=0x1000 -for ev in "head" "after_head" "tail" "after_tail"; do +for ev in "head" "after_head"; do cat <<EOF break pwritev_rmw_$ev A aio_write -P 10 $((off + 0x200)) 0x200 @@ -211,16 +211,6 @@ function verify_io() echo read -P 11 0x2400 0x200 echo read -P 0 0x2600 0xa00 - echo read -P 0 0x3000 0x200 - echo read -P 10 0x3200 0x200 - echo read -P 11 0x3400 0x200 - echo read -P 0 0x3600 0xa00 - - echo read -P 0 0x4000 0x200 - echo read -P 10 0x4200 0x200 - echo read -P 11 0x4400 0x200 - echo read -P 0 0x4600 0xa00 - # Chained dependencies echo read -P 10 0x5000 0x200 echo read -P 11 0x5200 0x200 |