From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B87DCC77B7A for ; Wed, 24 May 2023 09:36:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229839AbjEXJgM (ORCPT ); Wed, 24 May 2023 05:36:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53414 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229751AbjEXJfs (ORCPT ); Wed, 24 May 2023 05:35:48 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0F239E55; Wed, 24 May 2023 02:35:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Transfer-Encoding: Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date: Sender:Reply-To:Content-ID:Content-Description; bh=Dq2/xPmnodnbbQMnix8EKRleSU9lxflCTwZrdL+JKew=; b=K6jPGfF6XEoTSx04m1/lrNA0O/ W0D3Pw7nMrLVxg9xhcQOVW99G4D5puN3UW/Q4hnGPTETNIhbvdQR1RZ+HWtpeiZH6huHuuvFmC/nx BtEk5HGeyISrr3+bZVW4cdHEHob4FUtzfTpnP6u+9jRibOdTsMj/JEsU3jYZoVXhj/PB2CwXo7mU4 J8wjaCXEXMtB9Ey6j/q9sM5hZnhu041JIXHrpJDkuWB2KNuEVKFjPHjEaQx2TFn7f7Jqmvy2QkNso eLv1R9YLuX6uolUpKpTK0p0m/ab7PiZEzSbNNsaQOGosfG+Kb/QfIMM0SGr75SFe3WsCKuEsZS+L0 QJkY//jw==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1q1ktT-00B4En-MM; Wed, 24 May 2023 09:34:55 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id E603D3001AE; Wed, 24 May 2023 11:34:54 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id CCA312435C811; Wed, 24 May 2023 11:34:54 +0200 (CEST) Date: Wed, 24 May 2023 11:34:54 +0200 From: Peter Zijlstra To: Stephen Rothwell Cc: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Linux Kernel Mailing List , Linux Next Mailing List , Michael Ellerman , PowerPC Subject: Re: linux-next: boot failure after merge of the tip tree Message-ID: <20230524093454.GI4253@hirez.programming.kicks-ass.net> References: <20230524154459.48cda184@canb.auug.org.au> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable In-Reply-To: <20230524154459.48cda184@canb.auug.org.au> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 24, 2023 at 03:44:59PM +1000, Stephen Rothwell wrote: > Hi all, >=20 > After merging the tip tree, today's linux-next build (powerpc > pseries_le_defconfig) failed to boot like this: >=20 > Built 1 zonelists, mobility grouping on. Total pages: 32736 > Policy zone: Normal > mem auto-init: stack:all(zero), heap alloc:off, heap free:off > Memory: 2027392K/2097152K available (17984K kernel code, 3328K rwdata, 1= 4784K rodata, 6080K init, 1671K bss, 69760K reserved, 0K cma-reserved) >=20 > *crickets* >=20 > Bisected to commit >=20 > f4ab23558310 ("slub: Replace cmpxchg_double()") >=20 > I have reverted that commit (and the following one) for today. Sorry about that; turns out I forgot to test the case where cmpxchg128 wasn't available. Please see: https://lkml.kernel.org/r/20230524093246.GP83892@hirez.programming.kicks-= ass.net As stated there, I'm going to zap tip/locking/core for a few days and let this fixed version run through the robots again before re-instating it.