This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


Re: [Xen-devel] [PATCH] Fix xenconsole after aborted save

To: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH] Fix xenconsole after aborted save
From: Chris Lalancette <clalance@xxxxxxxxxx>
Date: Wed, 22 Apr 2009 11:49:22 +0200
Cc: Jiri Denemark <jdenemar@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Gerd Hoffmann <kraxel@xxxxxxxxxx>
Delivery-date: Wed, 22 Apr 2009 02:49:50 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <C612481D.9071%keir.fraser@xxxxxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <C612481D.9071%keir.fraser@xxxxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Thunderbird (X11/20090320)
Keir Fraser wrote:
> Another thing to note is I think this problem can only occur if the domU
> does not support suspend cancellation (advertised as SUSPEND_CANCEL in
> kernel elf notes -- see xen/xend/XendDomainInfo.py:resumeDomain()). Your
> kernels should support that feature -- suspend cancellation (a.k.a. Resume)
> is very likely to be hit-or-miss without it!

Could you elaborate a bit on this?  I was under the impression that suspend
cancellation was there mostly for the netaccel bits, but I have to admit I
didn't look at it very closely.  What scenarios do the suspend cancel bits help?

Chris Lalancette

Xen-devel mailing list