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] Re: [PATCH] xen: fix XEN_SAVE_RESTORE Kconfig dependenci

To: Jan Beulich <JBeulich@xxxxxxxxxx>
Subject: Re: [Xen-devel] Re: [PATCH] xen: fix XEN_SAVE_RESTORE Kconfig dependencies
From: Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>
Date: Wed, 23 Feb 2011 11:10:02 +0000
Cc: Shriram Rajagopalan <rshriram@xxxxxxxxx>, "Rafael J. Wysocki" <rjw@xxxxxxx>, "linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx" <linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Pavel Machek <pavel@xxxxxx>
Delivery-date: Wed, 23 Feb 2011 03:11:11 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <4D64F681020000780003347D@xxxxxxxxxxxxxxxxxx>
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>
Organization: Citrix Systems, Inc.
References: <1298446066-11754-1-git-send-email-rshriram@xxxxxxxxx> <1298452123.16356.10537.camel@xxxxxxxxxxxxxxxxxxxxxx> <4D64F681020000780003347D@xxxxxxxxxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
On Wed, 2011-02-23 at 10:58 +0000, Jan Beulich wrote:
> >>> On 23.02.11 at 10:08, Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx> wrote:
> > On Wed, 2011-02-23 at 07:27 +0000, Shriram Rajagopalan wrote:
> >> Make XEN_SAVE_RESTORE user visible and enable HIBERNATION and SWAP,
> >> if this option is enabled.
> > 
> > I was under the (perhaps mistaken?) impression that selecting user
> > visible Kconfig symbols was verboten since it has side-effects which
> > make it hard for users to figure out why something cannot be switched
> > off and/or how to turn things on etc.
> > 
> > In any case I think I preferred the "depends HIBERNATION" idea -- I
> > thought that was the consensus of the thread too?
> Why HIBERNATION (and SWAP) instead of SUSPEND? Xen doesn't
> support the former (other than the latter)...

HIBERNATION provides the FREEZE, THAW and RESUME methods which we would
like to use to integrate save/restore/checkpoint with the PM core i.e.
choose THAW vs. RESUME based on whether the suspend was cancelled (aka a
checkpoint) or not. See Shriram's other recent patch for details.


Xen-devel mailing list