From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f177.google.com (mail-wi0-f177.google.com [209.85.212.177]) by kanga.kvack.org (Postfix) with ESMTP id 1C8BE6B00D5 for ; Thu, 13 Nov 2014 07:24:09 -0500 (EST) Received: by mail-wi0-f177.google.com with SMTP id l15so4144087wiw.16 for ; Thu, 13 Nov 2014 04:24:08 -0800 (PST) Received: from cvs.linux-mips.org (eddie.linux-mips.org. [148.251.95.138]) by mx.google.com with ESMTP id ky4si20364220wjc.109.2014.11.13.04.24.08 for ; Thu, 13 Nov 2014 04:24:08 -0800 (PST) Received: from localhost.localdomain ([127.0.0.1]:51614 "EHLO linux-mips.org" rhost-flags-OK-OK-OK-FAIL) by eddie.linux-mips.org with ESMTP id S27013422AbaKMMYHrAK7h (ORCPT ); Thu, 13 Nov 2014 13:24:07 +0100 Date: Thu, 13 Nov 2014 13:24:06 +0100 From: Ralf Baechle Subject: Impact of removing VM_EXEC from brk area Message-ID: <20141113122406.GA19763@linux-mips.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Sender: owner-linux-mm@kvack.org List-ID: To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-mips@linux-mips.org, libc-alpha@sourceware.org A patch to remove VM_EXEC from VM_DATA_DEFAULT_FLAGS for MIPS has been submitted to me with the primary motivation for this change being some performance improvment. In other words, the patch would remove execute permission from a process brk area. It's however unclear to me how much software wreckage would result from such a change, even if the execute permission for the stack area remains unchanged. So, what would break? Thanks, Ralf -- 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