From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754226AbZFVXvX (ORCPT ); Mon, 22 Jun 2009 19:51:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752623AbZFVXvP (ORCPT ); Mon, 22 Jun 2009 19:51:15 -0400 Received: from gate.crashing.org ([63.228.1.57]:35718 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752365AbZFVXvO (ORCPT ); Mon, 22 Jun 2009 19:51:14 -0400 Subject: Re: Regression: ppc powerstation boot hang caused by slab initialisation code From: Benjamin Herrenschmidt To: James Bottomley Cc: Pekka Enberg , linux-kernel , "Rafael J. Wysocki" In-Reply-To: <1245712892.17035.39.camel@mulgrave.site> References: <1245708635.17035.6.camel@mulgrave.site> <1245709633.20062.13.camel@pasglop> <1245710457.17035.9.camel@mulgrave.site> <1245711062.4017.1.camel@pasglop> <1245712892.17035.39.camel@mulgrave.site> Content-Type: text/plain Date: Tue, 23 Jun 2009 09:51:07 +1000 Message-Id: <1245714667.4017.8.camel@pasglop> Mime-Version: 1.0 X-Mailer: Evolution 2.26.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2009-06-22 at 18:21 -0500, James Bottomley wrote: > On Tue, 2009-06-23 at 08:51 +1000, Benjamin Herrenschmidt wrote: > > Ah, I notice you use SLAB, that's the second report of hangs with it due to > > the changes. You can try SLUB while I'm looking, might help. > > Yes, switching to slub fixes it ... although given that the identified > problem commit is a slab one, that's understandable ... No, the commit actually moves all SL*B allocators earlier during boot. Basically, the aim is to remove the need for alloc_bootmem in 90% of boot code by making SL*B available much earlier. Cheers, Ben.