linux-kernel - Re: [uml-devel] UML hang with 100% CPU

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Date:	Thu, 8 Feb 2007 23:02:11 +0200
From:	"Pekka Enberg" <penberg@...helsinki.fi>
To:	"Jeff Dike" <jdike@...toit.com>
Cc:	"Miklos Szeredi" <miklos@...redi.hu>, linux-kernel@...r.kernel.org,
	user-mode-linux-devel@...ts.sourceforge.net
Subject: Re: [uml-devel] UML hang with 100% CPU

Hi,

On Thu, Feb 08, 2007 at 07:46:47PM +0100, Miklos Szeredi wrote:
> > It boots fine, then usually just after logging in and before starting
> > the shell (but sometimes after the shell started) it gets into some
> > loop.  Looking at the strace shows that two processes are
> > sending/receiving single '\0' bytes on some sockets endlessly.
> >
> > Does this ring a bell?

On 2/8/07, Jeff Dike <jdike@...toit.com> wrote:
> No, it doesn't.  This is a strace on the host, I take it?
>
> Can you get backtraces from the processes?

Just a datapoint: I had a similar problem with UML hanging on
2.6.20-rc something _host_ kernel whereas 2.6.19 worked fine. That was
with Gentoo userspace which I don't have anymore.
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