From mboxrd@z Thu Jan  1 00:00:00 1970
From: Richard Davies <richard.davies@elastichosts.com>
Subject: Re: Windows slow boot: contractor wanted
Date: Wed, 22 Aug 2012 15:41:50 +0100
Message-ID: <20120822144150.GA1400@alpha.arachsys.com>
References: <20120816104727.GA17166@alpha.arachsys.com>
 <502CDC0D.9080004@redhat.com>
 <20120817123642.GA16736@alpha.arachsys.com>
 <5030F273.5080706@redhat.com>
 <20120820135656.GA16676@alpha.arachsys.com>
 <50334E13.8020100@redhat.com>
 <20120821152107.GA16363@alpha.arachsys.com>
 <5034A18B.5040408@redhat.com>
 <20120822124032.GA12647@alpha.arachsys.com>
 <5034D437.8070106@redhat.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org,
	Rik van Riel <riel@redhat.com>
To: Avi Kivity <avi@redhat.com>
Return-path: <kvm-owner@vger.kernel.org>
Received: from alpha.arachsys.com ([91.203.57.7]:54635 "EHLO
	alpha.arachsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1756491Ab2HVOly (ORCPT <rfc822;kvm@vger.kernel.org>);
	Wed, 22 Aug 2012 10:41:54 -0400
Content-Disposition: inline
In-Reply-To: <5034D437.8070106@redhat.com>
Sender: kvm-owner@vger.kernel.org
List-ID: <kvm.vger.kernel.org>

Avi Kivity wrote:
> Richard Davies wrote:
> > I can trigger the slow boots without KSM and they have the same profile,
> > with _raw_spin_lock_irqsave and isolate_freepages_block at the top.
> >
> > I reduced to 3x 20GB 8-core VMs on a 128GB host (rather than 3x 40GB 8-core
> > VMs), and haven't managed to get a really slow boot yet (>5 minutes). I'll
> > post agan when I get one.
>
> I think you can go higher than that.  But 120GB on a 128GB host is
> pushing it.

I've now triggered a very slow boot at 3x 36GB 8-core VMs on a 128GB host
(i.e. 108GB on a 128GB host).

It has the same profile with _raw_spin_lock_irqsave and
isolate_freepages_block at the top.

Richard.