From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751483AbdEASdl (ORCPT ); Mon, 1 May 2017 14:33:41 -0400 Received: from mail-wr0-f193.google.com ([209.85.128.193]:35862 "EHLO mail-wr0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751041AbdEASdi (ORCPT ); Mon, 1 May 2017 14:33:38 -0400 Subject: Re: [PATCH man-pages 1/5] ioctl_userfaultfd.2: update description of shared memory areas To: Mike Rapoport References: <1493617399-20897-1-git-send-email-rppt@linux.vnet.ibm.com> <1493617399-20897-2-git-send-email-rppt@linux.vnet.ibm.com> Cc: mtk.manpages@gmail.com, Andrea Arcangeli , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-man@vger.kernel.org From: "Michael Kerrisk (man-pages)" Message-ID: <7ec5dfc0-9d84-e142-bfaa-d96383acbee9@gmail.com> Date: Mon, 1 May 2017 20:33:31 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: <1493617399-20897-2-git-send-email-rppt@linux.vnet.ibm.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello Mike, I've applied this patch, but have a question. On 05/01/2017 07:43 AM, Mike Rapoport wrote: > Signed-off-by: Mike Rapoport > --- > man2/ioctl_userfaultfd.2 | 13 +++++++++++-- > 1 file changed, 11 insertions(+), 2 deletions(-) > > diff --git a/man2/ioctl_userfaultfd.2 b/man2/ioctl_userfaultfd.2 > index 889feb9..6edd396 100644 > --- a/man2/ioctl_userfaultfd.2 > +++ b/man2/ioctl_userfaultfd.2 > @@ -181,8 +181,17 @@ virtual memory areas > .TP > .B UFFD_FEATURE_MISSING_SHMEM > If this feature bit is set, > -the kernel supports registering userfaultfd ranges on tmpfs > -virtual memory areas > +the kernel supports registering userfaultfd ranges on shared memory areas. > +This includes all kernel shared memory APIs: > +System V shared memory, > +tmpfs, > +/dev/zero, > +.BR mmap(2) > +with > +.I MAP_SHARED > +flag set, > +.BR memfd_create (2), > +etc. > > The returned > .I ioctls Does the change in this patch represent a change that occurred in Linux 4.11? If so, I think this needs to be said explicitly in the text. Cheers, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/