From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matt Helsley Subject: Re: [PATCH 1/9] exec_path 1/9: introduce ->exec_path and switch /proc/*/exe Date: Thu, 4 Jun 2009 14:30:33 -0700 Message-ID: <20090604213033.GZ9285@us.ibm.com> References: <20090526113618.GJ28083@us.ibm.com> <20090526162415.fb9cefef.akpm@linux-foundation.org> <20090531215427.GA29534@x200.localdomain> <20090531151953.8f8b14b5.akpm@linux-foundation.org> <20090603230422.GB853@x200.localdomain> <20090604075532.GU9285@us.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Matt Helsley , Alexey Dobriyan , Andrew Morton , xemul@parallels.com, containers@lists.linux-foundation.org, linux-kernel@vger.kernel.org, dave@linux.vnet.ibm.com, mingo@elte.hu, linux-fsdevel@vger.kernel.org, Al Viro To: Linus Torvalds Return-path: Received: from e5.ny.us.ibm.com ([32.97.182.145]:48621 "EHLO e5.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755242AbZFDVad (ORCPT ); Thu, 4 Jun 2009 17:30:33 -0400 Content-Disposition: inline In-Reply-To: Sender: linux-fsdevel-owner@vger.kernel.org List-ID: On Thu, Jun 04, 2009 at 08:07:23AM -0700, Linus Torvalds wrote: > > > On Thu, 4 Jun 2009, Matt Helsley wrote: > > > > Doesn't this pin the vfs mount of the executable for the lifetime of > > the task? > > Well, yes, but so does the current code. Not quite. The current code pins it as long as the corresponding VMAs are mapped -- not for the lifetime of the task. > Sure, in _theory_ it can be a non-mmap executable (maybe people still have > those old OMAGIC a.out executables), and in _theory_ you could unmap the > executable even if it was originally mmap'ed, but neither of those is > exactly common, are they? Not common to my knowledge, no. > > So in practice, nothing has changed wrt lifetime of the executable. Almost all of the time, yes. Cheers, -Matt Helsley