linux-kernel - Re: [2.6.36-rc regression] occasional complete system hangs on sparc64 SMP

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Message-Id: <20101012.104238.104051243.davem@davemloft.net>
Date:	Tue, 12 Oct 2010 10:42:38 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	mikpe@...uu.se
Cc:	sparclinux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [2.6.36-rc regression] occasional complete system hangs on
 sparc64 SMP

From: Mikael Pettersson <mikpe@...uu.se>
Date: Sun, 3 Oct 2010 23:36:16 +0200

> I've been testing older kernels and can now say that 2.6.35-git5
> and newer kernels are definitely affected, but 2.6.35-git4 seems
> solid.  I'll dig deeper into the .35-git4->git5 changes towards
> the end of next week.
> 
> I never got any data out of sysrq-y or any other sysrq when a hang
> occurs; usually they'd just print the name of the command but no data,
> sometimes they'd oops and crash the kernel even harder.

So I haven't been ignoring this report, but I cannot reproduce
it on the SB2500 I have access to right now.

I've been doing gcc builds and testsuite runs in a loop for
several days.

Occaisionally I get a dying 'as' which I have seen before and
plan to investigate, but no hard hangs and no crashes.

I'll keep prodding, but if you can narrow it down further
please let us know.
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