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From: "Bram Matthys (Syzop)" <syzop@vulnscan.org>
To: user-mode-linux-devel@lists.sourceforge.net
Subject: [SPAM] Re: [uml-devel] umls unresponsive & consuming 100% cpu time
Date: Thu, 08 May 2008 12:02:39 +0200	[thread overview]
Message-ID: <4822CFBF.8060803@vulnscan.org> (raw)
In-Reply-To: <87hcd97ti9.fsf@hades.wkstn.nix>

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Nix wrote:
| On 7 May 2008, Bram Matthys said:
|> Or any help on how to get additional / useful info?
|
| Set
|
| CONFIG_DEBUG_INFO=y
| CONFIG_FRAME_POINTER=y
|
| in your kernel, and recompile. `bt' will then show heaps more info.

Thanks, I'll get back with the results once it hangs again.

I just noticed something odd at one of the uml's that didn't hang. That uml
is still running the .25 kernel (without the debugging info): it says login
timeout all the time, this might be why...
When I type 'date' every second I get this:
root@vsrv:~# date
Fri Sep  5 15:49:31 UTC 2008
root@vsrv:~# date
Thu Sep  4 03:51:46 UTC 2008
root@vsrv:~# date
Tue Sep  9 01:27:15 UTC 2008
root@vsrv:~# date
Fri Sep  5 02:27:58 UTC 2008
root@vsrv:~# date
Tue Sep  2 06:22:48 UTC 2008
root@vsrv:~# date
Tue Sep  9 03:21:44 UTC 2008
root@vsrv:~# date
Tue Sep  2 22:51:05 UTC 2008
root@vsrv:~# date
Sun Sep  7 09:18:25 UTC 2008
root@vsrv:~# date
Thu Sep 11 03:24:52 UTC 2008
root@vsrv:~# date
Thu Sep 11 20:24:11 UTC 2008

So it seems to hop both forward and backward.. heavily..

There's no ntp stuff running on the UML btw.

Date/Time on the main server is correct.

I did do this on the main server a few days ago:
/etc/init.d/ntp stop
hwclock --systohc
/etc/init.d/ntp start
due to these kernel messages (on the main):
'set_rtc_mmss: can't update from 90 to 21'
..which went away after that.
but could that really be related ?
(the hw clock was off by 1 hour or so, but linux time was ok)

	Bram.

- --
Bram Matthys
Software developer/IT consultant        syzop@vulnscan.org
PGP key:                       www.vulnscan.org/pubkey.asc
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  reply	other threads:[~2008-05-08 10:03 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-05-07 14:00 [uml-devel] umls unresponsive & consuming 100% cpu time Bram Matthys (Syzop)
2008-05-07 20:23 ` Nix
2008-05-08 10:02   ` Bram Matthys (Syzop) [this message]
2008-05-09 15:45 ` Jeff Dike
2008-05-10  8:41   ` [SPAM] " Bram Matthys (Syzop)
2008-05-13 15:40     ` Jeff Dike
2008-05-14  8:41     ` Sakari Ailus
2008-05-19 16:16       ` Jeff Dike
2008-05-31  9:16         ` Bram Matthys (Syzop)

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