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| From: | Avi Kivity |
| Subject: | [Qemu-devel] Re: [RFC][STABLE 0.13] Revert "qcow2: Use bdrv_(p)write_sync for metadata writes" |
| Date: | Wed, 25 Aug 2010 16:23:38 +0300 |
| User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.8) Gecko/20100806 Fedora/3.1.2-1.fc13 Thunderbird/3.1.2 |
On 08/25/2010 03:46 PM, Anthony Liguori wrote:
If we had another disk format that only supported growth and metadata for a backing file, can you think of another failure scenario?
btw, only supporting growth is a step backwards. Currently file-backed disks keep growing even the guest-used storage doesn't grow, since once we allocate something we never release it. But eventually guests will start using TRIM or DISCARD or however it's called, and then we can expose it and reclaim unused blocks.
-- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain.
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