linux-kernel - Re: Bootup fix for _brk_end being !=

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Date:	Tue, 15 Mar 2011 15:31:47 +0000
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	Daniel Kiper <dkiper@...-space.pl>
CC:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Stefano Stabellini <Stefano.Stabellini@...citrix.com>,
	Ian Campbell <Ian.Campbell@...citrix.com>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"andi.kleen@...el.com" <andi.kleen@...el.com>,
	"haicheng.li@...ux.intel.com" <haicheng.li@...ux.intel.com>,
	"fengguang.wu@...el.com" <fengguang.wu@...el.com>,
	"jeremy@...p.org" <jeremy@...p.org>,
	Dan Magenheimer <dan.magenheimer@...cle.com>,
	"v.tolstov@...fip.ru" <v.tolstov@...fip.ru>,
	"pasik@....fi" <pasik@....fi>,
	"dave@...ux.vnet.ibm.com" <dave@...ux.vnet.ibm.com>,
	"wdauchy@...il.com" <wdauchy@...il.com>,
	"rientjes@...gle.com" <rientjes@...gle.com>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: Bootup fix for _brk_end being != _end

On Tue, 15 Mar 2011, Daniel Kiper wrote:
> On Tue, Mar 15, 2011 at 10:48:21AM -0400, Konrad Rzeszutek Wilk wrote:
> > > > > Additionally, I suggest to apply patch prepared by Steffano Stabellini
> > > > > (https://lkml.org/lkml/2011/1/31/232) which fixes memory management
> > > > > issue in Xen guest. I was not able boot guest machine without
> > > > > above mentioned patch.
> > > >
> > > > after some discussions we came up with a different approach to fix the
> > > > issue; I sent a couple of patches a little while ago:
> > > >
> > > > https://lkml.org/lkml/2011/2/28/410
> > >
> > > I tested git://xenbits.xen.org/people/sstabellini/linux-pvhvm.git 2.6.38-tip-fixes
> > > and it works on x86_64, however, it does not work on i386. Tested as
> > > unprivileged guest on Xen Ver. 4.1.0-rc2-pre. On i386 domain crashes
> > > silently at early boot stage :-(((.
> >
> > Details? Can you provide the 'xenctx' output of where it crashed?
> 
> As I wrote above domain is dying and I am not able to connect to it using
> xenctx after crash :-(((. I do not know how to do that in another way.
> 

try adding:

extra = "loglevel=9 debug earlyprintk=xenboot"
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