From: Juergen Gross <jgross@suse.com>
To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: wei.liu2@citrix.com, stefano.stabellini@eu.citrix.com,
George.Dunlap@eu.citrix.com, ian.jackson@eu.citrix.com,
cyliu@suse.com, xen-devel@lists.xen.org
Subject: Re: [PATCH v2 3/3] libxl: add domain config parameter to force start of qemu
Date: Tue, 29 Mar 2016 06:44:32 +0200 [thread overview]
Message-ID: <56FA0830.7060906@suse.com> (raw)
In-Reply-To: <20160328145000.GC17944@char.us.oracle.com>
On 28/03/16 16:50, Konrad Rzeszutek Wilk wrote:
> On Tue, Mar 22, 2016 at 08:29:23AM +0100, Juergen Gross wrote:
>> Today the device model (qemu) is started for a pv domain only in case
>> a device requiring qemu is specified in the domain configuration
>> (qdisk, vfb, channel). If there is no such device the device model
>> isn't started and hence it is possible to add such a device to the
>> domain later.
>>
>> Add a domain configuration parameter to specify the device model is
>> to be started in any case. This will enable adding devices with a
>> qemu based backend later.
>
> .. s/devices/PV devices/
>
> As surely PV guests can't use emulated devices. Or could they? That
> would be quite interesting in a not kind of fun way.
Would require some work.
>
>>
>> While the optimal solution would be to start the device model
>> automatically when needed this would require some major rework of
>> libxl at multiple places.
>
> But you are not using this now (late start of QEMU), so why this patch?
This was the reason for the patch: start the device model early in order
to have it running in case it would be needed later.
Juergen
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next prev parent reply other threads:[~2016-03-29 4:44 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-22 7:29 [PATCH v2 0/3] libxl: add support for qemu base pvusb backend Juergen Gross
2016-03-22 7:29 ` [PATCH v2 1/3] libxl: make libxl__need_xenpv_qemu() operate on domain config Juergen Gross
2016-03-22 7:29 ` [PATCH v2 2/3] libxl: add new pvusb backend "qusb" provided by qemu Juergen Gross
2016-03-28 14:55 ` Konrad Rzeszutek Wilk
2016-03-29 4:53 ` Juergen Gross
2016-03-29 14:24 ` Konrad Rzeszutek Wilk
2016-03-29 14:28 ` Juergen Gross
2016-03-22 7:29 ` [PATCH v2 3/3] libxl: add domain config parameter to force start of qemu Juergen Gross
2016-03-28 14:50 ` Konrad Rzeszutek Wilk
2016-03-29 4:44 ` Juergen Gross [this message]
2016-03-29 14:27 ` Konrad Rzeszutek Wilk
2016-03-29 14:32 ` Juergen Gross
2016-03-22 15:31 ` [PATCH v2 0/3] libxl: add support for qemu base pvusb backend Juergen Gross
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