From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTP id B91ECDDE3E for ; Wed, 9 May 2007 09:45:57 +1000 (EST) Subject: Re: kernel expection generated with 2.6.21-mm1 kernel boot up From: Benjamin Herrenschmidt To: Linas Vepstas In-Reply-To: <20070508162350.GM4452@austin.ibm.com> References: <463F06E2.5060308@linux.vnet.ibm.com> <1178538912.24522.12.camel@concordia.ozlabs.ibm.com> <463F1CA9.40501@linux.vnet.ibm.com> <4640675C.6090104@in.ibm.com> <20070508162350.GM4452@austin.ibm.com> Content-Type: text/plain Date: Wed, 09 May 2007 09:45:37 +1000 Message-Id: <1178667937.14928.128.camel@localhost.localdomain> Mime-Version: 1.0 Cc: linuxppc-dev@ozlabs.org, Kamalesh Babulal , Balbir Singh List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Tue, 2007-05-08 at 11:23 -0500, Linas Vepstas wrote: > On Tue, May 08, 2007 at 05:34:44PM +0530, Srinivasa Ds wrote: > > > > Looks like problem is in SLUB layer, I unmarked SLUB(CONFIG_SLUB) > > option and now system is booting. > > Its been repored by others (and I can reproduce it), > its a problem with a bad interaction with SLUB and pg_tables > A patch flew by recetnly that would not use slub for pg_tables, > but I don't know if that's the permanent fix. Working on it... we'll be using __get_free_page() for the lowest level of page tables. Ben.