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] serial console & sysrq?

To: "Hollis Blanchard" <hollisb@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] serial console & sysrq?
From: "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>
Date: Wed, 17 Aug 2005 18:18:01 +0100
Delivery-date: Wed, 17 Aug 2005 17:16:11 +0000
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
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/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: AcWjSw6I/+FNhoFORViGio2KoOx6ZQABBkgg
Thread-topic: [Xen-devel] serial console & sysrq?
> On Thursday 11 August 2005 05:16, Ian Pratt wrote:
> > > is there some way to trigger sysrq from the serial console in 
> > > xenlinux?  With native linux it works by sending a break + sysrq 
> > > letter, in xenlinux it doesn't work that way though ...
> >
> > I'm not entirely sure how 'break' is signalled from the UART. We'll 
> > certainly fail to pass it on through xen to Linux as 
> there's no side 
> > channel.
> The hvc_console driver (used by kernels running on the 
> pSeries hypervisor) has a similar problem. ^O is used as the 
> break character there.

Seems reasonable. It would be good if someone could knock up a patch
that adds ^O sysrq support for xen console...


Xen-devel mailing list

<Prev in Thread] Current Thread [Next in Thread>