From: Jeff Dike <jdike@addtoit.com>
To: BlaisorBlade <blaisorblade_spam@yahoo.it>
Cc: user-mode-linux-devel@lists.sourceforge.net,
William Stearns <wstearns@pobox.com>
Subject: Re: [uml-devel] 2.6.3-rc2-uml1 Kernel mode panic
Date: Thu, 19 Feb 2004 14:35:29 -0500 [thread overview]
Message-ID: <20040219193529.GA3644@ccure.user-mode-linux.org> (raw)
In-Reply-To: <200402191914.01209.blaisorblade_spam@yahoo.it>
On Thu, Feb 19, 2004 at 07:14:01PM +0100, BlaisorBlade wrote:
> Since I'm not able to upload a kernel while you seem to have broad band, could
> you please (if it is not already so) provide a kernel with debugging symbols
> enabled and showing this bug to Jeff Dike, since it seems he cannot reproduce
> the bug?
I can reproduce it fine. The recipe that Bill provided works like a charm -
hit it from the outside with 'ssh uml some command'
run 'while true; do cat /dev/null; done' inside
and it will panic in 5-10 minutes in one of several ways. The exit.c BUG
is the process returning from the schedule at the end of exit(). The
kernel mode fault is the scheduler seeing that the runqueue bitmap says
there's a process to be scheduled waiting on a particular queue, but that
queue is empty.
Since the scheduler is involved in both of these, it's non-deterministic,
and seems to need a supply of interrupts to happen, it smells like the
scheduler is being interrupted when it shouldn't be.
Jeff
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next prev parent reply other threads:[~2004-02-19 19:12 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-15 3:06 [uml-devel] 2.6.3-rc2-uml1 Kernel mode panic William Stearns
2004-02-17 16:09 ` BlaisorBlade
2004-02-18 21:56 ` William Stearns
2004-02-19 18:14 ` BlaisorBlade
2004-02-19 18:31 ` William Stearns
2004-02-19 19:35 ` Jeff Dike [this message]
2004-02-19 19:24 ` BlaisorBlade
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