linux-kernel - Re: 2.6.21-rc5-mm4

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Message-ID: <4532.1175873184@turing-police.cc.vt.edu>
Date:	Fri, 06 Apr 2007 11:26:24 -0400
From:	Valdis.Kletnieks@...edu
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.21-rc5-mm4

On Thu, 05 Apr 2007 13:31:09 PDT, Andrew Morton said:
> On Thu, 05 Apr 2007 13:02:59 -0400, Valdis.Kletnieks@...edu wrote:

> > Am seeing an Oops 'cannot handle kernel paging request' during late
> > system startup, hand-copied traceback follows:
> > 
> > avc_has_perm_noaudit+0x2bf/0x506
> > avc_has_perm+0x2b/0x5b
> > selinux_socket_stream_connect+0x7e/0xc3
> > unix_stream_connect+0x202/0x3f3
> > sys_connect+0x7e/0xa4
> > tracesys+0xde/0xe1

> Thanks.
> 
> I'd have thought that the full trace could be captured with netconsole.

I didn't have a second box available at first.  Then I blew close to 45
minutes trying to figure out why netconsole was totally failing to work,
before I found this in .config:

# CONFIG_NETCONSOLE is not set

"Do'h!" -- H. Simpson

Unfortunately, defining netconsole caused NETPOLL to be defined, which caused
a recompile of half the known world, and the symptoms of the crash moved.

Film at 11, once I figure out what's going on, and fix the testbed in my
office so I can actually catch this sucker - I may have to string a serial
cable.  One solid good data point:

21-rc5 with only the -mm4 'origin.patch' applied is OK, so whatever the
issue is, it's not in Linus's tree.

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