linux-kernel - Re: frequent lockups in 3.18rc4

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Message-ID: <20141227003912.GB32271@codemonkey.org.uk>
Date:	Fri, 26 Dec 2014 19:39:12 -0500
From:	Dave Jones <davej@...emonkey.org.uk>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>, Chris Mason <clm@...com>,
	Mike Galbraith <umgwanakikbuti@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Dâniel Fraga <fragabr@...il.com>,
	Sasha Levin <sasha.levin@...cle.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Suresh Siddha <sbsiddha@...il.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Peter Anvin <hpa@...ux.intel.com>,
	John Stultz <john.stultz@...aro.org>
Subject: Re: frequent lockups in 3.18rc4

On Fri, Dec 26, 2014 at 03:30:20PM -0800, Linus Torvalds wrote:
 > On Fri, Dec 26, 2014 at 2:57 PM, Dave Jones <davej@...emonkey.org.uk> wrote:
 > >
 > > still running though..
 > 
 > Btw, did you ever boot with "tsc=reliable" as a kernel command line option?

I don't think so.

 > For the last night, can you see if you can just run it with that, and
 > things work?

Sure.

 > So I'm not even convinced that trying to debug some HPET issue is
 > really worth it. Especially if your machine is a preproduction board
 > from Intel.

Yeah, I agree. Even though it's strange that this only became a problem
this last few months for me, after over a year of abuse.

Hopefully the new year brings more trustworthy hardware.

	Dave

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