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Re: [Qemu-devel] [PATCH 0/2] deal with BDRV_BLOCK_RAW


From: Max Reitz
Subject: Re: [Qemu-devel] [PATCH 0/2] deal with BDRV_BLOCK_RAW
Date: Tue, 13 Aug 2019 16:31:11 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0

On 13.08.19 13:51, Kevin Wolf wrote:

[...]

> Hm... This is a mess. :-)

Just out of curiosity: Why?

Aren’t there only two things we really need from the block_status
infrastructure?

(1) Whether something is allocated in the given layer of the backing chain,

(2) Whether we know that a given range reads as zeroes.

Do we really need anything else?

Max

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