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[Qemu-devel] [RFC PATCH V2 2/4] hw/virtio-blk: add a constant for max nu
From: |
Peter Lieven |
Subject: |
[Qemu-devel] [RFC PATCH V2 2/4] hw/virtio-blk: add a constant for max number of merged requests |
Date: |
Fri, 5 Dec 2014 12:50:27 +0100 |
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>
---
hw/block/virtio-blk.c | 2 +-
include/hw/virtio/virtio-blk.h | 4 +++-
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index b19b102..490f961 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -326,7 +326,7 @@ static void virtio_blk_handle_write(VirtIOBlockReq *req,
MultiReqBuffer *mrb)
block_acct_start(blk_get_stats(req->dev->blk), &req->acct, req->qiov.size,
BLOCK_ACCT_WRITE);
- if (mrb->num_writes == 32) {
+ if (mrb->num_writes == VIRTIO_BLK_MAX_MERGE_REQS) {
virtio_submit_multiwrite(req->dev->blk, mrb);
}
diff --git a/include/hw/virtio/virtio-blk.h b/include/hw/virtio/virtio-blk.h
index 3979dc4..3f2652f 100644
--- a/include/hw/virtio/virtio-blk.h
+++ b/include/hw/virtio/virtio-blk.h
@@ -134,8 +134,10 @@ typedef struct VirtIOBlock {
struct VirtIOBlockDataPlane *dataplane;
} VirtIOBlock;
+#define VIRTIO_BLK_MAX_MERGE_REQS 32
+
typedef struct MultiReqBuffer {
- BlockRequest blkreq[32];
+ BlockRequest blkreq[VIRTIO_BLK_MAX_MERGE_REQS];
unsigned int num_writes;
} MultiReqBuffer;
--
1.7.9.5