From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756127AbbGUWOg (ORCPT ); Tue, 21 Jul 2015 18:14:36 -0400 Received: from mail-wi0-f181.google.com ([209.85.212.181]:35812 "EHLO mail-wi0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756061AbbGUWOe (ORCPT ); Tue, 21 Jul 2015 18:14:34 -0400 Date: Wed, 22 Jul 2015 01:14:29 +0300 From: "Kirill A. Shutemov" To: Andrew Morton Cc: "Kirill A. Shutemov" , Oleg Nesterov , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCHv2 0/6] Make vma_is_anonymous() reliable Message-ID: <20150721221429.GA7478@node.dhcp.inet.fi> References: <1437133993-91885-1-git-send-email-kirill.shutemov@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1437133993-91885-1-git-send-email-kirill.shutemov@linux.intel.com> User-Agent: Mutt/1.5.23.1 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jul 17, 2015 at 02:53:07PM +0300, Kirill A. Shutemov wrote: > We rely on ->vm_ops == NULL to detect anonymous VMA but this check is not > always reliable: > > - MPX sets ->vm_ops on anonymous VMA; > > - many drivers don't set ->vm_ops. See for instance hpet_mmap(). > > This patchset makes vma_is_anonymous() more reliable and makes few > cleanups around the code. > > v2: > - drop broken patch; > - more cleanup for mpx code (Oleg); > - vma_is_anonymous() in create_huge_pmd() and wp_huge_pmd(); > > Kirill A. Shutemov (5): > mm: mark most vm_operations_struct const > x86, mpx: do not set ->vm_ops on mpx VMAs > mm: make sure all file VMAs have ->vm_ops set > mm: use vma_is_anonymous() in create_huge_pmd() and wp_huge_pmd() > mm, madvise: use vma_is_anonymous() to check for anon VMA > > Oleg Nesterov (1): > mm, mpx: add "vm_flags_t vm_flags" arg to do_mmap_pgoff() ping? -- Kirill A. Shutemov