linux-kernel - Re: [PATCH 0/4 V3] Print traces on softlockup

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Message-Id: <20140422112828.ea511cefa17affb99d9aa97f@linux-foundation.org>
Date:	Tue, 22 Apr 2014 11:28:28 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Don Zickus <dzickus@...hat.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
	davem@...emloft.net, sparclinux@...r.kernel.org, mguzik@...hat.com
Subject: Re: [PATCH 0/4 V3] Print traces on softlockup

On Tue, 22 Apr 2014 11:17:24 -0400 Don Zickus <dzickus@...hat.com> wrote:

> Added more patches to handle the 'uniprocessor' panic case by sending NMIs
> to every cpu but self.  Only affects x86, sparc.
> 

Looks OK to me.  A couple of things:

- Patches 1-3 should be combined so we don't create bisection holes
  due to x86 and sparc build errors.

- Patch 4 adds stuff which is unusable on uniprocessor, especially
  the presence of /proc/sys/kernel/softlockup_all_cpu_backtrace.  We
  already have #ifdef CONFIG_SMP in kern_table, so do more of that?

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