From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-f179.google.com (mail-pd0-f179.google.com [209.85.192.179]) by kanga.kvack.org (Postfix) with ESMTP id 1F3256B0032 for ; Wed, 25 Feb 2015 15:30:50 -0500 (EST) Received: by pdbnh10 with SMTP id nh10so7344725pdb.11 for ; Wed, 25 Feb 2015 12:30:49 -0800 (PST) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org. [140.211.169.12]) by mx.google.com with ESMTPS id im8si3607634pbc.229.2015.02.25.12.30.49 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 25 Feb 2015 12:30:49 -0800 (PST) Date: Wed, 25 Feb 2015 12:30:48 -0800 From: Andrew Morton Subject: Re: 4.0-rc1/PARISC: BUG: non-zero nr_pmds on freeing mm Message-Id: <20150225123048.a9c97ea726f747e029b4688a@linux-foundation.org> In-Reply-To: <20150225202130.GA31491@node.dhcp.inet.fi> References: <20150224225454.GA14117@fuloong-minipc.musicnaut.iki.fi> <20150225202130.GA31491@node.dhcp.inet.fi> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: "Kirill A. Shutemov" Cc: Aaro Koskinen , "Kirill A. Shutemov" , linux-parisc@vger.kernel.org, linux-mm@kvack.org On Wed, 25 Feb 2015 22:21:30 +0200 "Kirill A. Shutemov" wrote: > On Wed, Feb 25, 2015 at 12:54:54AM +0200, Aaro Koskinen wrote: > > Hi, > > > > Here's a kernel config to reproduce the issue (no special steps needed, > > just boot to userspace), and bootlog after that: > > > > # > > # Automatically generated file; DO NOT EDIT. > > # Linux/parisc 4.0.0-rc1 Kernel Configuration > ... > > [ 18.940000] BUG: non-zero nr_pmds on freeing mm: -6 > > It happens due missing __PAGETABLE_PMD_FOLDED in custom page table > folding. This has been fixed in CONFIG_PGTABLE_LEVELS patcheset. > > Andrew, are you going to submit that patchset to Linus in this cycle? I wasn't planning on doing so - the changelog didn't say anything about fixing any regressions. > If not, I can prepare a patchset which only adds missing > __PAGETABLE_PUD_FOLDED and __PAGETABLE_PMD_FOLDED. Something simple would be preferred, but I don't know how much simpler the above would be? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org