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[Qemu-devel] [PATCH v2 6/6] qcow2: drop unnecessary flush in qcow2_updat
From: |
Stefan Hajnoczi |
Subject: |
[Qemu-devel] [PATCH v2 6/6] qcow2: drop unnecessary flush in qcow2_update_snapshot_refcount() |
Date: |
Mon, 4 Mar 2013 15:02:35 +0100 |
We already flush when the function completes. There is no need to flush
after every compressed cluster.
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
block/qcow2-refcount.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c
index 92519ea..9bfb390 100644
--- a/block/qcow2-refcount.c
+++ b/block/qcow2-refcount.c
@@ -790,10 +790,6 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs,
if (ret < 0) {
goto fail;
}
-
- /* TODO Flushing once for the whole function should
- * be enough */
- bdrv_flush(bs->file);
}
/* compressed clusters are never modified */
refcount = 2;
--
1.8.1.4
- [Qemu-devel] [PATCH v2 0/6] qcow2: cache flush fixes and performance improvements, Stefan Hajnoczi, 2013/03/04
- [Qemu-devel] [PATCH v2 1/6] qcow2: flush refcount cache correctly in alloc_refcount_block(), Stefan Hajnoczi, 2013/03/04
- [Qemu-devel] [PATCH v2 2/6] qcow2: flush refcount cache correctly in qcow2_write_snapshots(), Stefan Hajnoczi, 2013/03/04
- [Qemu-devel] [PATCH v2 3/6] qcow2: set L2 cache dependency in qcow2_alloc_bytes(), Stefan Hajnoczi, 2013/03/04
- [Qemu-devel] [PATCH v2 5/6] qcow2: drop flush in update_cluster_refcount(), Stefan Hajnoczi, 2013/03/04
- [Qemu-devel] [PATCH v2 6/6] qcow2: drop unnecessary flush in qcow2_update_snapshot_refcount(),
Stefan Hajnoczi <=
- [Qemu-devel] [PATCH v2 4/6] qcow2: flush in qcow2_update_snapshot_refcount(), Stefan Hajnoczi, 2013/03/04
- Re: [Qemu-devel] [PATCH v2 0/6] qcow2: cache flush fixes and performance improvements, Kevin Wolf, 2013/03/04