From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx149.postini.com [74.125.245.149]) by kanga.kvack.org (Postfix) with SMTP id 87BCA6B0044 for ; Mon, 2 Apr 2012 06:13:53 -0400 (EDT) Received: by bkwq16 with SMTP id q16so2668394bkw.14 for ; Mon, 02 Apr 2012 03:13:51 -0700 (PDT) Message-ID: <4F797BDD.2020905@openvz.org> Date: Mon, 02 Apr 2012 14:13:49 +0400 From: Konstantin Khlebnikov MIME-Version: 1.0 Subject: Re: [PATCH 6/7] mm: kill vma flag VM_EXECUTABLE References: <20120331091049.19373.28994.stgit@zurg> <20120331092929.19920.54540.stgit@zurg> <20120331201324.GA17565@redhat.com> <20120331203912.GB687@moon> <4F79755B.3030703@openvz.org> <20120402095444.GE7607@moon> In-Reply-To: <20120402095444.GE7607@moon> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Cyrill Gorcunov Cc: Oleg Nesterov , "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 wrote: > On Mon, Apr 02, 2012 at 01:46:03PM +0400, Konstantin Khlebnikov wrote: >> Cyrill Gorcunov wrote: >>> On Sat, Mar 31, 2012 at 10:13:24PM +0200, Oleg Nesterov wrote: >>>> >>>> Add Cyrill. This conflicts with >>>> c-r-prctl-add-ability-to-set-new-mm_struct-exe_file.patch in -mm. >>> >>> Thanks for CC'ing, Oleg. I think if thise series go in it won't >>> be a problem to update my patch accordingly. >> >> In this patch I leave mm->exe_file lockless. >> After exec/fork we can change it only for current task and only if mm->mm_users == 1. >> >> something like this: >> >> task_lock(current); >> if (atomic_read(¤t->mm->mm_users) == 1) >> set_mm_exe_file(current->mm, new_file); >> else >> ret = -EBUSY; >> task_unlock(current); >> >> task_lock() protect this code against get_task_mm() > > I see. Konstantin, the question is what is more convenient way to update the > patch in linux-next. The c-r-prctl-add-ability-to-set-new-mm_struct-exe_file.patch > is in -mm already, so I either should wait until Andrew pick your series up and > send updating patch on top, or I could fetch your series, update my patch and > send it here as reply. Hmm? Let's wait for Andrew's response. And maybe somebody disagree with my changes. -- 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