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Re: [Qemu-devel] [PATCH v2] vmdk: Only read cid from image file when ope
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From: |
Stefan Hajnoczi |
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Subject: |
Re: [Qemu-devel] [PATCH v2] vmdk: Only read cid from image file when opening |
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Date: |
Fri, 18 Oct 2013 13:40:21 +0200 |
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User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Fri, Oct 18, 2013 at 01:17:19PM +0800, Fam Zheng wrote:
> Previously cid of parent is parsed from image file for every IO request.
> We already have L1/L2 cache and don't have assumption that parent image
> can be updated behind us, so remove this to get more efficiency.
>
> The parent CID is checked only for once after opening.
>
> Signed-off-by: Fam Zheng <address@hidden>
>
> ---
> v2: Use cid_checked. (Stefan)
>
> Signed-off-by: Fam Zheng <address@hidden>
> ---
> block/vmdk.c | 8 +++-----
> 1 file changed, 3 insertions(+), 5 deletions(-)
Thanks, applied to my block tree:
https://github.com/stefanha/qemu/commits/block
Stefan