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Re: [Qemu-block] [Qemu-devel] [PATCH v2 0/3] block: Warn about usage of
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-block] [Qemu-devel] [PATCH v2 0/3] block: Warn about usage of growing formats over non-growable protocols |
Date: |
Tue, 5 May 2015 10:46:06 +0100 |
User-agent: |
Mutt/1.5.23 (2014-03-12) |
On Thu, Mar 19, 2015 at 03:03:18PM -0400, Max Reitz wrote:
> Some image formats (e.g. qcow2) require the underlying file to grow on
> write accesses, but this is in fact not supported by all protocols (e.g.
> nbd does not). If such a format requiring file growth is used
> non-read-only over a protocol which does not support this, a warning
> should be issued.
>
> This warning is issued for example whenever one tries to export a qcow2
> image over nbd-server and use the export from qemu.
The warning implies that the user should switch to read-only or a
different protocol, but this configuration is perfectly normal. For
example, oVirt uses qcow2 on LVM volumes.
Introducing a warning for a normal QEMU invocation is a bit weird.
What is the point of this series? Were users confused that they hit
ENOSPC?
Stefan
pgpWEmac_KGUD.pgp
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- Re: [Qemu-block] [Qemu-devel] [PATCH v2 0/3] block: Warn about usage of growing formats over non-growable protocols,
Stefan Hajnoczi <=
- Re: [Qemu-block] [Qemu-devel] [PATCH v2 0/3] block: Warn about usage of growing formats over non-growable protocols, Max Reitz, 2015/05/06
- Re: [Qemu-block] [Qemu-devel] [PATCH v2 0/3] block: Warn about usage of growing formats over non-growable protocols, Paolo Bonzini, 2015/05/06
- Re: [Qemu-block] [Qemu-devel] [PATCH v2 0/3] block: Warn about usage of growing formats over non-growable protocols, Max Reitz, 2015/05/06
- Re: [Qemu-block] [Qemu-devel] [PATCH v2 0/3] block: Warn about usage of growing formats over non-growable protocols, Paolo Bonzini, 2015/05/06
- Re: [Qemu-block] [Qemu-devel] [PATCH v2 0/3] block: Warn about usage of growing formats over non-growable protocols, Max Reitz, 2015/05/06
- Re: [Qemu-block] [Qemu-devel] [PATCH v2 0/3] block: Warn about usage of growing formats over non-growable protocols, Paolo Bonzini, 2015/05/06
- Re: [Qemu-block] [Qemu-devel] [PATCH v2 0/3] block: Warn about usage of growing formats over non-growable protocols, Max Reitz, 2015/05/06
- Re: [Qemu-block] [Qemu-devel] [PATCH v2 0/3] block: Warn about usage of growing formats over non-growable protocols, Paolo Bonzini, 2015/05/07
- Re: [Qemu-block] [Qemu-devel] [PATCH v2 0/3] block: Warn about usage of growing formats over non-growable protocols, Kevin Wolf, 2015/05/07
- Re: [Qemu-block] [Qemu-devel] [PATCH v2 0/3] block: Warn about usage of growing formats over non-growable protocols, Paolo Bonzini, 2015/05/07