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[Qemu-block] [PATCH] virtio-blk: trivial code optimization
From: |
arei.gonglei |
Subject: |
[Qemu-block] [PATCH] virtio-blk: trivial code optimization |
Date: |
Fri, 6 Nov 2015 09:04:57 +0800 |
From: Gonglei <address@hidden>
Signed-off-by: Gonglei <address@hidden>
---
hw/block/virtio-blk.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index 093e475..752586d 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -409,18 +409,20 @@ void virtio_blk_submit_multireq(BlockBackend *blk,
MultiReqBuffer *mrb)
/* merge would exceed maximum number of IOVs */
if (niov + req->qiov.niov > IOV_MAX) {
merge = false;
+ goto unmerge;
}
/* merge would exceed maximum transfer length of backend device */
if (req->qiov.size / BDRV_SECTOR_SIZE + nb_sectors > max_xfer_len)
{
merge = false;
+ goto unmerge;
}
/* requests are not sequential */
if (sector_num + nb_sectors != req->sector_num) {
merge = false;
}
-
+unmerge:
if (!merge) {
submit_requests(blk, mrb, start, num_reqs, niov);
num_reqs = 0;
--
1.7.12.4
- [Qemu-block] [PATCH] virtio-blk: trivial code optimization,
arei.gonglei <=