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Re: [Qemu-devel] [PATCH 4/4] qmp: add BLOCK_MEDIUM_EJECT event


From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH 4/4] qmp: add BLOCK_MEDIUM_EJECT event
Date: Fri, 17 Feb 2012 11:48:09 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0) Gecko/20120131 Thunderbird/10.0

On 02/17/2012 10:53 AM, Kevin Wolf wrote:
> > Note: device models call bdrv_eject() whether the state changed or not.
> > The only use for that I can see is syncing a wayward physical tray to
> > the virtual one.  Shouldn't be necessary with Paolo's recent work,
> > should it?
> 
> The one case that I'm unsure about is migration. I thought we sync the
> physical tray with the virtual one then (or at least we discussed it),
> but I don't really know what we do today, or even what the right thing
> to do is in some cases.

Migration with passthrough doesn't make sense.  The only way it could
work (untested) is if the destination connected via iSCSI to the
source's CD-ROM.  In which case the physical and virtual tray would be
synced already.

Paolo



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