From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Vrabel <david.vrabel@citrix.com>
Subject: Re: [RFC PATCH V3 21/22] Only allow extended event
 channel on Dom0 and driver domains
Date: Thu, 28 Feb 2013 12:43:16 +0000
Message-ID: <512F50E4.6020201@citrix.com>
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To: Wei Liu <wei.liu2@citrix.com>
Cc: "Keir (Xen.org)" <keir@xen.org>, Ian Campbell <Ian.Campbell@citrix.com>, "jbeulich@suse.com" <jbeulich@suse.com>, "xen-devel@lists.xen.org" <xen-devel@lists.xen.org>
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On 27/02/13 14:34, Wei Liu wrote:
> For non-Dom0 domains, add a flag to indicate whether it can use extended event
> channel, admins can specify this flag when creating a driver domain.
> 
> The rationale behide this option is, a) extended event channel will
> consume global mapping space in Xen, b) likely that only Dom0 and driver
> domains need this.

I would prefer the toolstack to limit the max port that the guest can
use (see the EVTCHNOP_set_limit sub-op I proposed), than this single bit
(which isn't useful for the FIFO-based proposal).

David