Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753587AbbBMXhn (ORCPT ); Fri, 13 Feb 2015 18:37:43 -0500 Received: from ozlabs.org ([103.22.144.67]:52762 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753294AbbBMXhm (ORCPT ); Fri, 13 Feb 2015 18:37:42 -0500 Date: Sat, 14 Feb 2015 10:37:34 +1100 From: Stephen Rothwell To: Guenter Roeck Cc: linux-next@vger.kernel.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" , Andrew Morton , Sabrina Dubroca Subject: Re: linux-next: Tree for Feb 13 (runtime failures and 'non-zero nr_pmds' messages) Message-ID: <20150214103734.3052cd2f@canb.auug.org.au> In-Reply-To: <20150213185428.GA31193@roeck-us.net> References: <20150213165615.1ad43047@canb.auug.org.au> <20150213185428.GA31193@roeck-us.net> X-Mailer: Claws Mail 3.11.1 (GTK+ 2.24.25; i586-pc-linux-gnu) MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; boundary="Sig_/6mYdyl_z00KQLPIwBJ4_Q_m"; protocol="application/pgp-signature" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4823 Lines: 147 --Sig_/6mYdyl_z00KQLPIwBJ4_Q_m Content-Type: multipart/mixed; boundary="MP_/4Pam9CByG4Qzsu=FO/Zff=A" --MP_/4Pam9CByG4Qzsu=FO/Zff=A Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Hi Guenter, On Fri, 13 Feb 2015 10:54:28 -0800 Guenter Roeck wrote: > > I see a number of runtime failures with this version. > It affects alpha, mips64, ppc64, and x86_64. > Symptom is always the same. There are lots of >=20 > BUG: non-zero nr_pmds on freeing mm: X (where X is 1..4) >=20 > messages in the log, and the affected VMs don't reboot. >=20 > I don't see the problem in curent mainline, nor in mmotm. > Bisect points to "Merge branch 'akpm-current/current'", > which isn't really helpful. >=20 > Not sure if this is a bad merge resolution, so just take this > as a heads-up for now. Yours is the second report overnight (see attached). Almost certainly a bad merge resolution on my part (its a bit hard when Andrew get part of his patch set merged by Linus :-() I will fix up the merge on Monday (unless Andrew gets more stuff merged or updates mmotm for me). Sorry about that. --=20 Cheers, Stephen Rothwell sfr@canb.auug.org.au --MP_/4Pam9CByG4Qzsu=FO/Zff=A Content-Type: message/rfc822 Content-Transfer-Encoding: binary Content-Disposition: inline Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on bilbo.ozlabs.org X-Original-To: sfr@canb.auug.org.au Delivered-To: sfr@ozlabs.org Received: from smtp3-g21.free.fr (smtp3-g21.free.fr [212.27.42.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 5662314028E for ; Fri, 13 Feb 2015 22:03:36 +1100 (AEDT) Received: from kria (unknown [IPv6:2a01:e35:8b11:1410:6ea0:5486:4093:b69]) by smtp3-g21.free.fr (Postfix) with ESMTP id A70C7A6321; Fri, 13 Feb 2015 12:03:22 +0100 (CET) Date: Fri, 13 Feb 2015 12:03:26 +0100 From: Sabrina Dubroca To: Stephen Rothwell Cc: linux-next@vger.kernel.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: Re: linux-next: Tree for Feb 13 Message-ID: <20150213110326.GA26177@kria> References: <20150213165615.1ad43047@canb.auug.org.au> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20150213165615.1ad43047@canb.auug.org.au> User-Agent: Mutt/1.5.23 (2014-03-12) 2015-02-13, 16:56:15 +1100, Stephen Rothwell wrote: > Hi all, > > Please do not add any material destined for v3.21 to your linux-next > included trees until after v3.20-rc1 has been released. > > Changes since 20150212: Hi Stephen, Your conflict resolution in 8fe7fba50596 "Merge branch 'akpm-current/current'" for mm/memory.c looks a bit off. I get flooded with these messages: BUG: non-zero nr_pmds on freeing mm: 4 and fixed it with: diff --git a/mm/memory.c b/mm/memory.c index 450e4952c5ef..802adda2b0b6 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -3350,7 +3350,6 @@ int __pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long address) smp_wmb(); /* See comment in __pte_alloc */ spin_lock(&mm->page_table_lock); - mm_inc_nr_pmds(mm); #ifndef __ARCH_HAS_4LEVEL_HACK if (!pud_present(*pud)) { mm_inc_nr_pmds(mm); references: http://www.spinics.net/lists/linux-mm/msg84294.html dc6c9a35b66b "mm: account pmd page tables to the process" [CC'ed Kirill A. Shutemov] Thanks -- Sabrina --MP_/4Pam9CByG4Qzsu=FO/Zff=A-- --Sig_/6mYdyl_z00KQLPIwBJ4_Q_m Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCAAGBQJU3orDAAoJEMDTa8Ir7ZwV450P/3Z6YCG66rtqaLPnZETXv5ux ZmlIJZWUqeHvN7NdnvMHO8R18vbxLt42v3GFJWo1xOSLKpYyW6/n6n+uS4vOptIl VOOpJeO96tGF0tS6dbXMV+mWnhCtw6cNjHNb0G92heb8Jh5anLIjRt4sqJsgKsDV c9zJzblJMJv/KqwDomUBogYkhhcNZrJNkNbvsCKrfxCg/SV5LI6X6HINFDqe/WiV 71WErHVNudZ6BxqfccyBftzS5zE34lMW1XzLpoz0bCv3AVzBiVEIyb18P90wilOp pWDr1E2YMriIYdMl9PJazEM4OU6OoS1djorrLRW6yuZEl+srbRei5D4F/4hhzkoV JGjY0QXXEqxW5+28idHBAowF7FLMXVjIsl/ERZ5wCzZiq8BwfS9/+W75O+VwYQvk LcOQOGQRv5Fr94bNxqe/AFTAVBoZavgNwhRkJ7kOKaYPurQGpjy8m9To0omKjPOl ZiyxlCAyWgrKmqVIQ+19xoq15FjG1H5aLlOT9r/WjcAIScF1ZZ879/9Vt6CdmJ1+ WV+6F/cAsJbCrabGuhhf7yDtLs8g2cdQgrokzZeF/pC7i+yXAV3P/LKi9B15B2Dv tGoU9w35K3FhxVzw/jIvQnqfu/9ldTaax3eUGgbCJBkzck2GzHP02R3oQyPfIqtT o6EOMwbpTnSAySGFfObj =WLxx -----END PGP SIGNATURE----- --Sig_/6mYdyl_z00KQLPIwBJ4_Q_m-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/