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From: William Dauchy <wdauchy@gmail.com>
Date: Wed, 23 Feb 2011 10:42:02 +0100
Message-ID: <AANLkTimAtEAvCXs+rvVmU1P6DDBsvwHbnxPoV=n=4mqb@mail.gmail.com>
Subject: Re: [Qemu-devel] [PATCH] Remove a detached device from
	qemu_device_opts.
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To: Minoru Usui <usui@mxm.nes.nec.co.jp>
Cc: Ken'ichi Ohmichi <oomichi@mxs.nes.nec.co.jp>, qemu-devel@nongnu.org

Hi Minoru,

On Tue, Feb 15, 2011 at 3:32 AM, Minoru Usui <usui@mxm.nes.nec.co.jp> wrote=
:
> I can reproduce, too.
> But strangely, it don't occur in case of loading acpiphp driver
> to the guest VM on below environment.
>
> =A0Host : RHEL6.0
> =A0Guest: RHEL5.5
>
> Unfortunately, I'm not familiar with qemu-kvm.
> I investigated below questions about this problem, but I couldn't resolve=
 them.
>
> =A0- How to call qdev_free() asynchronously. (How should we fix this prob=
lem)
> =A0- Why it don't occur with acpiphp driver
>
> If anyone knows answer of above questions or its clue, please let me know=
.

If fact this is not a bug.
`qdev_free` is called when the acpi detach succeed in `pciej_write`.
The virtual machine has to correctly support acpi signals.
Please read the explanation from Markus Armbruster on
http://lists.nongnu.org/archive/html/qemu-devel/2011-02/msg02637.html

Regards,

--=20
William