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| author | Kevin Wolf <kwolf@redhat.com> | 2009-06-30 13:06:04 +0200 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2009-07-09 16:06:37 -0500 |
| commit | 0aa217e46124e873f75501f7187657e063f5903b (patch) | |
| tree | b6d293dd84f7a3bc8eb8a1d9358b1a2f3ccc0a34 /block/qcow2.c | |
| parent | fc5b81d1f6df7342f0963120b2cf3e919d6fc08a (diff) | |
| download | qemu-0aa217e46124e873f75501f7187657e063f5903b.tar.gz qemu-0aa217e46124e873f75501f7187657e063f5903b.tar.bz2 qemu-0aa217e46124e873f75501f7187657e063f5903b.zip | |
qcow2: Make cache=writethrough default
The performance of qcow2 has improved meanwhile, so we don't need to
special-case it any more. Switch the default to write-through caching
like all other block drivers.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'block/qcow2.c')
| -rw-r--r-- | block/qcow2.c | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/block/qcow2.c b/block/qcow2.c index 20c114b139..9a7c666ee7 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -145,14 +145,6 @@ static int qcow_open(BlockDriverState *bs, const char *filename, int flags) QCowHeader header; uint64_t ext_end; - /* Performance is terrible right now with cache=writethrough due mainly - * to reference count updates. If the user does not explicitly specify - * a caching type, force to writeback caching. - */ - if ((flags & BDRV_O_CACHE_DEF)) { - flags |= BDRV_O_CACHE_WB; - flags &= ~BDRV_O_CACHE_DEF; - } ret = bdrv_file_open(&s->hd, filename, flags); if (ret < 0) return ret; |