From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx185.postini.com [74.125.245.185]) by kanga.kvack.org (Postfix) with SMTP id 11D2A6B004D for ; Mon, 2 Apr 2012 19:05:17 -0400 (EDT) Received: from /spool/local by e1.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 2 Apr 2012 19:05:15 -0400 Received: from d01relay06.pok.ibm.com (d01relay06.pok.ibm.com [9.56.227.116]) by d01dlp01.pok.ibm.com (Postfix) with ESMTP id 57BAC38C8052 for ; Mon, 2 Apr 2012 19:04:27 -0400 (EDT) Received: from d01av02.pok.ibm.com (d01av02.pok.ibm.com [9.56.224.216]) by d01relay06.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q32N4RL32924544 for ; Mon, 2 Apr 2012 19:04:27 -0400 Received: from d01av02.pok.ibm.com (loopback [127.0.0.1]) by d01av02.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q32N4R80002406 for ; Mon, 2 Apr 2012 20:04:27 -0300 Date: Mon, 2 Apr 2012 16:04:23 -0700 From: Matt Helsley Subject: Re: [PATCH 6/7] mm: kill vma flag VM_EXECUTABLE Message-ID: <20120402230423.GB32299@count0.beaverton.ibm.com> References: <20120331091049.19373.28994.stgit@zurg> <20120331092929.19920.54540.stgit@zurg> <20120331201324.GA17565@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20120331201324.GA17565@redhat.com> Sender: owner-linux-mm@kvack.org List-ID: To: Oleg Nesterov Cc: Konstantin Khlebnikov , linux-mm@kvack.org, Andrew Morton , linux-kernel@vger.kernel.org, Eric Paris , linux-security-module@vger.kernel.org, oprofile-list@lists.sf.net, Matt Helsley , Linus Torvalds , Al Viro , Cyrill Gorcunov On Sat, Mar 31, 2012 at 10:13:24PM +0200, Oleg Nesterov wrote: > On 03/31, Konstantin Khlebnikov wrote: > > > > comment from v2.6.25-6245-g925d1c4 ("procfs task exe symlink"), > > where all this stuff was introduced: > > > > > ... > > > This avoids pinning the mounted filesystem. > > > > So, this logic is hooked into every file mmap/unmmap and vma split/merge just to > > fix some hypothetical pinning fs from umounting by mm which already unmapped all > > its executable files, but still alive. Does anyone know any real world example? > > This is the question to Matt. This is where I got the scenario: https://lkml.org/lkml/2007/7/12/398 Cheers, -Matt Helsley PS: I seem to keep coming back to this so I hope folks don't mind if I leave some more references to make (re)searching this topic easier: Thread with Cyrill Gorcunov discussing c/r of symlink: https://lkml.org/lkml/2012/3/16/448 Thread with Oleg Nesterov re: cleanups: https://lkml.org/lkml/2012/3/5/240 Thread with Alexey Dobriyan re: cleanups: https://lkml.org/lkml/2009/6/4/625 mainline commit 925d1c401fa6cfd0df5d2e37da8981494ccdec07 Date: Tue Apr 29 01:01:36 2008 -0700 procfs task exe symlink -- 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