From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752518Ab1ATQ6N (ORCPT ); Thu, 20 Jan 2011 11:58:13 -0500 Received: from mx1.redhat.com ([209.132.183.28]:19128 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752422Ab1ATQ6M (ORCPT ); Thu, 20 Jan 2011 11:58:12 -0500 Date: Thu, 20 Jan 2011 17:57:34 +0100 From: Andrea Arcangeli To: Steven Rostedt Cc: LKML , Andrew Morton , Rik van Riel , Linus Torvalds Subject: Re: [BUG] khugepaged crashes on x86_32 Message-ID: <20110120165734.GI21494@random.random> References: <1295542013.12215.2755.camel@gandalf.stny.rr.com> <1295542365.12215.2762.camel@gandalf.stny.rr.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1295542365.12215.2762.camel@gandalf.stny.rr.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Steven, On Thu, Jan 20, 2011 at 11:52:45AM -0500, Steven Rostedt wrote: > On Thu, 2011-01-20 at 11:46 -0500, Steven Rostedt wrote: > > > I hit this bug with both v2.6.38-rc1 and with > > > > HEAD == 12fcdba1b7ae8b25696433f420b775aeb556d89b > > Note, this is not fully reproducible at every boot. To test manually, I > had to boot up a couple of times to trigger it. But it never took more > than 5 boots to do so. I test by just booting up and shutting down, it > may trigger with some use as well, but I did not try that. There was a highpte mistake in khugepaged that only affected 32bit with HIGHPTE enabled so it wasn't noticed yet. Fix pointed out by Minchan is queued in -mm (Johannes's submit).