linux-kernel - Kernel hangs in SMP + VMware environment.

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Date:	Tue, 13 May 2008 06:41:34 +0900
From:	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
To:	linux-kernel@...r.kernel.org
Subject: Kernel hangs in SMP + VMware environment.

I'm experiencing hang up problem with recent kernels in VMware environment.

Here are two examples.

http://I-love.SAKURA.ne.jp/tmp/messages.1 (203kB)
http://I-love.SAKURA.ne.jp/tmp/messages.2 (1.7MB)

The messages.1 is a log when "tar" stopped processing
while extracting a .tar.bz2 file by
"rpmbuild -bb --target i586 --with baseonly kernel.spec".
I got this log in runlevel 3 of Fedora 8.

The messages.2 is a log when the compiler processes (e.g. "cc1")
seem to be hanged up (no compiler messages appear for minutes,
which unlikely happen).
I got this log in runlevel 1 of Fedora 8
by "rpmbuild -bb --target i586 --with baseonly kernel.spec"
after starting rsyslog and stopping anacron.

I experience this problem in many distro (e.g. Fedora, Ubuntu, SuSE),
which use kenel (I think) around 2.6.21 and later.

I experience this problem only in VMware.
I have never experienced this problem in native environment.

I experience this problem only when I assign 2 CPUs to VMware.
I have never experienced this problem with 1 CPU.

May be something scheduler related in SMP + VMware environment.

The a.out process in the log files are http://lkml.org/lkml/2008/5/12/130
What other information should I dump for identifying the location of hang up?

Regards.
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