linux-kernel - Re: frequent lockups in 3.18rc4

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Message-ID: <CA+55aFw68nC+5s=iX2R4SLsgG3nBvURmDXYvX5pFJgHBnQoHMA@mail.gmail.com>
Date:	Thu, 11 Dec 2014 14:36:41 -0800
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Sasha Levin <sasha.levin@...cle.com>
Cc:	Dave Jones <davej@...hat.com>, Chris Mason <clm@...com>,
	Mike Galbraith <umgwanakikbuti@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Dâniel Fraga <fragabr@...il.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: frequent lockups in 3.18rc4

On Thu, Dec 11, 2014 at 1:52 PM, Sasha Levin <sasha.levin@...cle.com> wrote:
>
> Is it possible that Dave and myself were seeing the same problem after
> all?

Could be. You do have commonalities, even if the actual symptoms then
differ. And while it looked different when you could trigger it with
3.16 but DaveJ couldn't, that's up in the air now that I doubt that
3.16 really is ok for DaveJ after all..

And you might have a better luck bisecting it, since you seem to be
able to trigger your RCU lockup much more quickly (and apparently
reliably? Correct?)

                     Linus
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