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Re: [Qemu-block] [Qemu-devel] [PULL 10/18] block: Move 'discard' option

From: Kevin Wolf
Subject: Re: [Qemu-block] [Qemu-devel] [PULL 10/18] block: Move 'discard' option to bdrv_open_common()
Date: Fri, 7 Oct 2016 12:20:37 +0200
User-agent: Mutt/1.5.21 (2010-09-15)

Am 07.10.2016 um 11:01 hat Gerd Hoffmann geschrieben:
> On Di, 2016-09-27 at 15:53 +0200, Kevin Wolf wrote:
> > This enables its use for nested child nodes. The compatibility
> > between the 'discard' and 'detect-zeroes' setting is checked in
> > bdrv_open_common() now as the former setting isn't available before
> > calling bdrv_open() any more.
> Seems this change makes libvirt not see the discard option any more,
> "virsh start" throws this error now ...
> error: Failed to start domain fedora-org-xhci
> error: unsupported configuration: discard is not supported by this QEMU
> binary
> ... and git bisect found this commit.

The fix is already on the list:

    [PATCH] block: Add bdrv_runtime_opts to query-command-line-options


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