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Re: [Qemu-devel] [PATCH 2/3] qcow2: add option to clean unused cache ent

From: Alberto Garcia
Subject: Re: [Qemu-devel] [PATCH 2/3] qcow2: add option to clean unused cache entries after some time
Date: Thu, 28 May 2015 17:02:54 +0200
User-agent: Notmuch/0.13.2 (http://notmuchmail.org) Emacs/23.2.1 (i486-pc-linux-gnu)

On Thu 28 May 2015 04:56:34 PM CEST, Max Reitz wrote:
>>         'compat': 'str',
>>         '*lazy-refcounts': 'bool',
>>         '*corrupt': 'bool',
>> -      'refcount-bits': 'int'
>> +      'refcount-bits': 'int',
>> +      'cache-clean-interval': 'int'
>>     } }
> I'm not too happy about making this part of ImageInfoSpecificQCow2.
> Two reasons for this: First, it's eventually part of ImageInfo, which
> is defined as "Information about a QEMU image file", but this option
> cannot be set in the image file itself but is only a run-time option.

That's a valid point. Now that I think of it, do we actually have a way
to retrieve the sizes of the L2 and refcount caches? I think cache-size,
l2-cache-size, and refcount-cache-size are already write-only values.


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