From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752489AbYL3GOU (ORCPT ); Tue, 30 Dec 2008 01:14:20 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751202AbYL3GOM (ORCPT ); Tue, 30 Dec 2008 01:14:12 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:46944 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751179AbYL3GOL (ORCPT ); Tue, 30 Dec 2008 01:14:11 -0500 Date: Tue, 30 Dec 2008 07:13:44 +0100 From: Ingo Molnar To: Nick Piggin Cc: Andrew Morton , ebiederm@xmission.com, linux-kernel@vger.kernel.org, tglx@linutronix.de, ijc@hellion.org.uk Subject: Re: early fixmap causes kmap breakage Message-ID: <20081230061344.GA28281@elte.hu> References: <20081218211543.GB10681@wotan.suse.de> <20081229151731.2a2c5a02.akpm@linux-foundation.org> <20081230040118.GA27679@wotan.suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20081230040118.GA27679@wotan.suse.de> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Nick Piggin wrote: > On Mon, Dec 29, 2008 at 03:17:31PM -0800, Andrew Morton wrote: > > On Thu, 18 Dec 2008 22:15:43 +0100 > > Nick Piggin wrote: > > > > > Hi, > > > > > > I've debugged a problem where i386+pae systems with more than a few CPUs > > > blow up at boot in the kmap_atomic code. > > > > ping? > > No further progress here, I'm waiting on input for how to fix this > "nicely". Meantime, clearing the early fixmap pte I guess works, but you > lose a page... is it possible to put it into .initdata or is there some > issue with that? (I guess on a PAE kernel, 4K isn't a big deal). yeah, 4K shouldnt be a big deal. Mind sending a patch for this? Ingo