From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932462Ab1CZA1a (ORCPT ); Fri, 25 Mar 2011 20:27:30 -0400 Received: from kroah.org ([198.145.64.141]:41474 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932260Ab1CYXwX (ORCPT ); Fri, 25 Mar 2011 19:52:23 -0400 X-Mailbox-Line: From gregkh@clark.kroah.org Fri Mar 25 16:45:09 2011 Message-Id: <20110325234509.234055975@clark.kroah.org> User-Agent: quilt/0.48-16.4 Date: Fri, 25 Mar 2011 16:43:49 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: stable-review@kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Hugh Dickins Subject: [13/63] shmem: let shared anonymous be nonlinear again In-Reply-To: <20110325234526.GA18017@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2.6.38-stable review patch. If anyone has any objections, please let us know. ------------------ From: Hugh Dickins commit bee4c36a5cf5c9f63ce1d7372aa62045fbd16d47 upstream. Up to 2.6.22, you could use remap_file_pages(2) on a tmpfs file or a shared mapping of /dev/zero or a shared anonymous mapping. In 2.6.23 we disabled it by default, but set VM_CAN_NONLINEAR to enable it on safe mappings. We made sure to set it in shmem_mmap() for tmpfs files, but missed it in shmem_zero_setup() for the others. Fix that at last. Reported-by: Kenny Simpson Signed-off-by: Hugh Dickins Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman --- mm/shmem.c | 1 + 1 file changed, 1 insertion(+) --- a/mm/shmem.c +++ b/mm/shmem.c @@ -2791,5 +2791,6 @@ int shmem_zero_setup(struct vm_area_stru fput(vma->vm_file); vma->vm_file = file; vma->vm_ops = &shmem_vm_ops; + vma->vm_flags |= VM_CAN_NONLINEAR; return 0; }