From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pb0-f43.google.com (mail-pb0-f43.google.com [209.85.160.43]) by kanga.kvack.org (Postfix) with ESMTP id 370ED6B00DA for ; Sun, 27 Oct 2013 09:43:05 -0400 (EDT) Received: by mail-pb0-f43.google.com with SMTP id md4so898207pbc.30 for ; Sun, 27 Oct 2013 06:43:04 -0700 (PDT) Received: from psmtp.com ([74.125.245.176]) by mx.google.com with SMTP id gw3si10406303pac.317.2013.10.27.06.43.03 for ; Sun, 27 Oct 2013 06:43:04 -0700 (PDT) Received: by mail-qe0-f49.google.com with SMTP id a11so3383232qen.22 for ; Sun, 27 Oct 2013 06:43:02 -0700 (PDT) Date: Sun, 27 Oct 2013 09:42:57 -0400 From: Tejun Heo Subject: Re: ARM/kirkwood: v3.12-rc6: kernel BUG at mm/util.c:390! Message-ID: <20131027134257.GB30783@mtj.dyndns.org> References: <20131024200730.GB17447@blackmetal.musicnaut.iki.fi> <20131026143617.GA14034@mudshark.cambridge.arm.com> <20131027195115.208f40f3@tom-ThinkPad-T410> <20131027125036.GJ17447@blackmetal.musicnaut.iki.fi> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org List-ID: To: Ming Lei Cc: Aaro Koskinen , Will Deacon , Russell King - ARM Linux , Simon Baatz , Catalin Marinas , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "linux-arm-kernel@lists.infradead.org" , Andrew Morton , FUJITA Tomonori , "James E.J. Bottomley" , Jens Axboe On Sun, Oct 27, 2013 at 09:16:53PM +0800, Ming Lei wrote: > On Sun, Oct 27, 2013 at 8:50 PM, Aaro Koskinen wrote: > > > > On ARM v3.9 or older kernels do not trigger this BUG, at seems it only > > started to appear with the following commit (bisected): > > > > commit 1bc39742aab09248169ef9d3727c9def3528b3f3 > > Author: Simon Baatz > > Date: Mon Jun 10 21:10:12 2013 +0100 > > > > ARM: 7755/1: handle user space mapped pages in flush_kernel_dcache_page > > The above commit only starts to implement the helper on ARM, > but according to Documentation/cachetlb.txt, looks caller of > flush_kernel_dcache_page() should make sure the passed > 'page' is a user space page. I don't think PageSlab() is the right test tho. Wouldn't testing against user_addr_max() make more sense? Thanks. -- tejun -- 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