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[Qemu-devel] [PATCHv2 4/6] hw/virtio-blk: add a constant for max number
From: |
Peter Lieven |
Subject: |
[Qemu-devel] [PATCHv2 4/6] hw/virtio-blk: add a constant for max number of merged requests |
Date: |
Wed, 22 Oct 2014 15:21:58 +0200 |
As it was not obvious (at least for me) where the 32 comes from;
add a constant for it.
Signed-off-by: Peter Lieven <address@hidden>
Reviewed-by: Max Reitz <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 1fa9770..555bcea 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -306,6 +306,8 @@ static bool virtio_blk_sect_range_ok(VirtIOBlock *dev,
return true;
}
+#define MAX_MERGE_REQS 32
+
static void virtio_blk_handle_write(VirtIOBlockReq *req, MultiReqBuffer *mrb)
{
BlockRequest *blkreq;
@@ -324,7 +326,7 @@ static void virtio_blk_handle_write(VirtIOBlockReq *req,
MultiReqBuffer *mrb)
block_acct_start(bdrv_get_stats(req->dev->bs), &req->acct, req->qiov.size,
BLOCK_ACCT_WRITE);
- if (mrb->num_writes == 32) {
+ if (mrb->num_writes == MAX_MERGE_REQS) {
virtio_submit_multiwrite(req->dev->bs, mrb);
}
--
1.7.9.5
- [Qemu-devel] [PATCHv2 0/6] multiwrite patches for 2.2, Peter Lieven, 2014/10/22
- [Qemu-devel] [PATCHv2 4/6] hw/virtio-blk: add a constant for max number of merged requests,
Peter Lieven <=
- [Qemu-devel] [PATCHv2 2/6] block: introduce bdrv_runtime_opts, Peter Lieven, 2014/10/22
- [Qemu-devel] [PATCHv2 3/6] block: add a knob to disable multiwrite_merge, Peter Lieven, 2014/10/22
- [Qemu-devel] [PATCHv2 1/6] block: add accounting for merged requests, Peter Lieven, 2014/10/22
- [Qemu-devel] [PATCHv2 6/6] block: fix qemu-iotest reference output for test 067, Peter Lieven, 2014/10/22
- [Qemu-devel] [PATCHv2 5/6] block: add qemu-iotest for write-merge parameter, Peter Lieven, 2014/10/22