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Re: [Qemu-block] [PATCH v4 3/3] block/stream: introduce a bottom node
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From: |
Alberto Garcia |
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Subject: |
Re: [Qemu-block] [PATCH v4 3/3] block/stream: introduce a bottom node |
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Date: |
Tue, 09 Apr 2019 15:16:34 +0200 |
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User-agent: |
Notmuch/0.18.2 (http://notmuchmail.org) Emacs/24.4.1 (i586-pc-linux-gnu) |
On Mon 08 Apr 2019 08:22:21 PM CEST, Andrey Shinkevich wrote:
> The bottom node is the intermediate block device that has the base as its
> backing image. It is used instead of the base node while a block stream
> job is running to avoid dependency on the base that may change due to the
> parallel jobs. The change may take place due to a filter node as well that
> is inserted between the base and the intermediate bottom node. It occurs
> when the base node is the top one for another commit or stream job.
> After the introduction of the bottom node, don't freeze its backing child,
> that's the base, anymore.
>
> Suggested-by: Vladimir Sementsov-Ogievskiy <address@hidden>
> Signed-off-by: Andrey Shinkevich <address@hidden>
Reviewed-by: Alberto Garcia <address@hidden>
Berto