netdev - Re: UNIX sockets kernel panic

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Message-ID: <20081106151434.GA4968@shorty>
Date:	Thu, 6 Nov 2008 15:14:34 +0000
From:	Andrea Bittau <a.bittau@...ucl.ac.uk>
To:	David Miller <davem@...hat.com>
Cc:	adobriyan@...il.com, netdev@...r.kernel.org
Subject: Re: UNIX sockets kernel panic

I'm still seeing problems with your patch.  I'm getting mixed results.
With SMP off, everything seems to work.  With SMP, on my laptop, it
still barfs (.26 and .27).  Here's a screenshot (literally) of .26:
http://darkircop.org/unix.jpg

I can't seem to reproduce it on qemu using -smp.  However, on qemu, with
kernel 2.6.19, your patch, and -smp 2, I can get this one to hang:
http://darkircop.org/unix2.c

On my laptop, with 2.6.19 and SMP on, I think that everything works.
It's likely that it's a scheduling / configuration problem, so I
don't think there's anything magic in .19.
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