[Xen-devel] Re: Xen 4.1 interrupts not delievered.

To:	Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, Bruce Edge <bruce.edge@xxxxxxxxx>, <Ray.Lin@xxxxxxx>, <linux@xxxxxxxxxxxxxx>, <caker@xxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>, Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>, <m.a.young@xxxxxxxxxxxx>, Jeremy Fitzhardinge <jeremy@xxxxxxxx>, <pasik@xxxxxx>
Subject:	[Xen-devel] Re: Xen 4.1 interrupts not delievered.
From:	Keir Fraser <keir@xxxxxxx>
Date:	Wed, 13 Oct 2010 00:34:58 +0100
Cc:
Delivery-date:	Tue, 12 Oct 2010 16:36:04 -0700
Dkim-signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:sender:user-agent:date :subject:from:to:message-id:thread-topic:thread-index:in-reply-to :mime-version:content-type:content-transfer-encoding; bh=/tonbsxLC1FGc59xA/MGPKni4uqthpojNsQbZf24SvM=; b=OnDmSsnUp+IWbbGKzx9myAfk4aBX+AJ/i1rQm2eaoZ29fJLLkkaQnU5LQbKTFKdHpf ox3M+rkYNqH4+0+SPAKErOppschRobKqnoC3ZID6zXY0keXQFCaHbY2M2kt6hrOpYQJd +QHDWvNw35IMc104MeRLGLFgt3JAEjNPuiBGo=
Domainkey-signature:	a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=sender:user-agent:date:subject:from:to:message-id:thread-topic :thread-index:in-reply-to:mime-version:content-type :content-transfer-encoding; b=NSEooqGRhmMn3BVtUsEc/MgsjueZoEVTpPDkKHIpy+2Jb9qEmsgceAqI8Q06mHqIka d7daVbJ+1TgX9n88a6tiNHEdIp9NFjKJ2FMFW8cCaBnOzQEZeeMyLsnEjKcH4IesmnLQ Q+tdfixrezfSbR+lIiLqKg4w3/RtZtsIoEc8k=
Envelope-to:	www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to:	<20101012171745.GA27232@xxxxxxxxxxxx>
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>
Sender:	xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index:	ActqZhTlAIXqZ/5kNESzhXMM69nbug==
Thread-topic:	Xen 4.1 interrupts not delievered.
User-agent:	Microsoft-Entourage/12.26.0.100708

On 12/10/2010 18:17, "Konrad Rzeszutek Wilk" <konrad.wilk@xxxxxxxxxx> wrote:

> A couple of that might fix the problems are:
> 
>  1). Ian's fix to the event channels:
> http://xenbits.xen.org/gitweb?p=people/ianc/linux-2.6.git;a=commit;h=5d30cb2a8
> 5912ffb5f6556d55472c26801eef2ea
>  2). Disable IRQ balancing in Xen (and also in Linux kernel). "noirqbalance"
>  3). Pin domains, but nothing to Domain 0.

ITYM cpu 0. Not that this should rightly make any difference that I can see.

My suspicion would be the per-CPU IDT patches introduced during 4.0
development. Or changes to enable deep C-state sleeps by default. One or the
other causing lost interrupts. I think the latter can be discounted by
max_cstate=1 as a Xen boot parameter. The former would require trying a
build of Xen before and after changesets 20072/20073 -- they are the ones
that did the heavy lifting to implement per-CPU IDTs.

 -- Keir

> But it might be worth trying them out?

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

WARNING - OLD ARCHIVES

xen-devel

[Xen-devel] Re: Xen 4.1 interrupts not delievered.