From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail191.messagelabs.com (mail191.messagelabs.com [216.82.242.19]) by kanga.kvack.org (Postfix) with ESMTP id 89CDA900086 for ; Tue, 12 Apr 2011 10:22:22 -0400 (EDT) Received: from mail-iw0-f169.google.com (mail-iw0-f169.google.com [209.85.214.169]) (authenticated bits=0) by smtp1.linux-foundation.org (8.14.2/8.13.5/Debian-3ubuntu1.1) with ESMTP id p3CELgHq020156 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=FAIL) for ; Tue, 12 Apr 2011 07:21:43 -0700 Received: by iwg8 with SMTP id 8so9367405iwg.14 for ; Tue, 12 Apr 2011 07:21:40 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: References: From: Linus Torvalds Date: Tue, 12 Apr 2011 07:21:20 -0700 Message-ID: Subject: Re: [PATCH] mm: fix possible cause of a page_mapped BUG Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Sender: owner-linux-mm@kvack.org List-ID: To: =?UTF-8?B?Um9iZXJ0IMWad2nEmWNraQ==?= Cc: Hugh Dickins , Andrew Morton , Miklos Szeredi , Michel Lespinasse , "Eric W. Biederman" , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Peter Zijlstra , Rik van Riel On Tue, Apr 12, 2011 at 2:58 AM, Robert =C5=9Awi=C4=99cki wrote: > > So, if this case is not caught later on in the code, I guess it solves > the problem. During the fuzzing I didn't experience any panic's, but > some other problems arose, i.e. cannot read /proc//maps for some > processes (sys_read hangs, and such process cannot be killed or > stopped with any signal, still it's running (R state) and using CPU - > I'll submit another report for that). Hmm. Sounds like an endless loop in kernel mode. Use "perf record -ag" as root, it should show up very clearly in the report= . Linus -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org