From: David Vrabel <david.vrabel@citrix.com>
To: Juergen Gross <jgross@suse.com>,
David Vrabel <david.vrabel@citrix.com>,
<linux-kernel@vger.kernel.org>, <xen-devel@lists.xensource.com>,
<konrad.wilk@oracle.com>, <boris.ostrovsky@oracle.com>,
<linux-usb@vger.kernel.org>, <gregkh@linuxfoundation.org>,
<cyliu@suse.com>
Subject: Re: [Xen-devel] [PATCH 3/4] usb: Introduce Xen pvUSB backend
Date: Wed, 4 Mar 2015 14:19:20 +0000 [thread overview]
Message-ID: <54F71468.3030207@citrix.com> (raw)
In-Reply-To: <54F71221.6050800@suse.com>
On 04/03/15 14:09, Juergen Gross wrote:
>
> The main question whether it is worth to consider this alternative is
> the performance aspect. Does anyone have an idea which USB devices would
> typically be used via pvusb? I'd suspect memory sticks and USB disks
> and perhaps webcams being the most performance relevant ones. Is an
> additional copy operation of user data acceptable here?
I have no idea. We (XenServer) have no use cases at all for USB device
passthrough.
David
WARNING: multiple messages have this Message-ID (diff)
From: David Vrabel <david.vrabel-Sxgqhf6Nn4DQT0dZR+AlfA@public.gmane.org>
To: Juergen Gross <jgross-IBi9RG/b67k@public.gmane.org>,
David Vrabel
<david.vrabel-Sxgqhf6Nn4DQT0dZR+AlfA@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
xen-devel-GuqFBffKawuULHF6PoxzQEEOCMrvLtNR@public.gmane.org,
konrad.wilk-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org,
boris.ostrovsky-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org,
linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org,
cyliu-IBi9RG/b67k@public.gmane.org
Subject: Re: [Xen-devel] [PATCH 3/4] usb: Introduce Xen pvUSB backend
Date: Wed, 4 Mar 2015 14:19:20 +0000 [thread overview]
Message-ID: <54F71468.3030207@citrix.com> (raw)
In-Reply-To: <54F71221.6050800-IBi9RG/b67k@public.gmane.org>
On 04/03/15 14:09, Juergen Gross wrote:
>
> The main question whether it is worth to consider this alternative is
> the performance aspect. Does anyone have an idea which USB devices would
> typically be used via pvusb? I'd suspect memory sticks and USB disks
> and perhaps webcams being the most performance relevant ones. Is an
> additional copy operation of user data acceptable here?
I have no idea. We (XenServer) have no use cases at all for USB device
passthrough.
David
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next prev parent reply other threads:[~2015-03-04 14:19 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-26 13:35 [PATCH 0/4] xen, usb: support pvUSB drivers Juergen Gross
2015-02-26 13:35 ` [PATCH 1/4] usb: Add Xen pvUSB protocol description Juergen Gross
2015-02-26 13:35 ` [PATCH 2/4] usb: Introduce Xen pvUSB frontend Juergen Gross
2015-02-26 14:09 ` Oliver Neukum
2015-02-26 13:35 ` [PATCH 3/4] usb: Introduce Xen pvUSB backend Juergen Gross
2015-03-02 11:39 ` [Xen-devel] " David Vrabel
2015-03-02 11:39 ` David Vrabel
2015-03-04 13:31 ` Juergen Gross
2015-03-04 13:41 ` Ian Campbell
2015-03-04 13:41 ` Ian Campbell
2015-03-04 13:45 ` Juergen Gross
2015-03-04 13:53 ` David Vrabel
2015-03-04 13:53 ` David Vrabel
2015-03-04 14:09 ` Juergen Gross
2015-03-04 14:09 ` Juergen Gross
2015-03-04 14:19 ` David Vrabel [this message]
2015-03-04 14:19 ` David Vrabel
2015-03-04 14:29 ` Ian Campbell
2015-03-04 14:29 ` Ian Campbell
2015-03-04 14:41 ` Juergen Gross
2015-03-04 14:43 ` Peter Stuge
2015-03-04 14:43 ` Peter Stuge
2015-03-04 14:46 ` Ian Campbell
2015-03-04 14:46 ` Ian Campbell
2015-03-06 10:59 ` Pasi Kärkkäinen
2015-03-06 10:59 ` Pasi Kärkkäinen
2015-03-06 12:52 ` [Xen-devel] " Austin S Hemmelgarn
2015-03-04 15:27 ` Greg KH
2015-03-04 15:31 ` Juergen Gross
2015-02-26 13:35 ` [PATCH 4/4] xen: add Xen pvUSB maintainer Juergen Gross
2015-02-26 17:25 ` Konrad Rzeszutek Wilk
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