linux-kernel - Re: frequent lockups in 3.18rc4

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Message-ID: <20141118213113.GA31432@redhat.com>
Date:	Tue, 18 Nov 2014 16:31:13 -0500
From:	Dave Jones <davej@...hat.com>
To:	Don Zickus <dzickus@...hat.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	the arch/x86 maintainers <x86@...nel.org>
Subject: Re: frequent lockups in 3.18rc4

On Tue, Nov 18, 2014 at 04:25:53PM -0500, Don Zickus wrote:
 
 > I was going to reply about both points too. :-)  Though the mangling looks
 > odd because we have spin_locks serializing the output for each cpu.
 > 
 > Another thing I wanted to ask DaveJ, did you recently turn on
 > CONFIG_PREEMPT?  That would explain why you are seeing the softlockups
 > now.  If you disable CONFIG_PREEMPT does the softlockups disappear.

I've had it on on my test box forever.  I'll add trying turning to off
to the list of things to try.

	Dave
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