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Re: [PATCH v4 07/30] qcow2: Document the Extended L2 Entries feature
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From: |
Alberto Garcia |
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Subject: |
Re: [PATCH v4 07/30] qcow2: Document the Extended L2 Entries feature |
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Date: |
Tue, 14 Apr 2020 16:50:21 +0200 |
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User-agent: |
Notmuch/0.18.2 (http://notmuchmail.org) Emacs/24.4.1 (i586-pc-linux-gnu) |
On Fri 10 Apr 2020 11:29:59 AM CEST, Vladimir Sementsov-Ogievskiy wrote:
>> Hmm - raw external files are incompatible with backing files. Should
>> we also document that extended L2 entries are incompatible with raw
>> external files? (The text here reminded me about it, but it would be
>> the text earlier at the incompatible feature bits that we edit if we
>> want that additional restriction; compare to the restriction in the
>> autoclear bit 1). After all, when raw external file is enabled, the
>> entire image is allocated, at which point subclusters don't make much
>> sense.
> It still may cache information about zeroed subclusters: gives more
> detailed block-status. But we should mention somehow external
> files. Hm. not only for raw external files, but it is documented that
> cluster can't be unallocated when an external data file is used.
What do you mean by "cluster can't be unallocated" ?
Berto
Re: [PATCH v4 07/30] qcow2: Document the Extended L2 Entries feature, Alberto Garcia, 2020/04/10
Re: [PATCH v4 07/30] qcow2: Document the Extended L2 Entries feature, Alberto Garcia, 2020/04/14