From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail143.messagelabs.com (mail143.messagelabs.com [216.82.254.35]) by kanga.kvack.org (Postfix) with ESMTP id 43EED6B005D for ; Tue, 11 Aug 2009 18:13:35 -0400 (EDT) Received: from d03relay02.boulder.ibm.com (d03relay02.boulder.ibm.com [9.17.195.227]) by e38.co.us.ibm.com (8.14.3/8.13.1) with ESMTP id n7BM9xkD007424 for ; Tue, 11 Aug 2009 16:09:59 -0600 Received: from d03av04.boulder.ibm.com (d03av04.boulder.ibm.com [9.17.195.170]) by d03relay02.boulder.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id n7BMDYiT257556 for ; Tue, 11 Aug 2009 16:13:34 -0600 Received: from d03av04.boulder.ibm.com (loopback [127.0.0.1]) by d03av04.boulder.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id n7BMDVfN017244 for ; Tue, 11 Aug 2009 16:13:33 -0600 From: Eric B Munson Subject: [PATCH 0/3] Add pseudo-anonymous huge page mappings Date: Tue, 11 Aug 2009 23:13:16 +0100 Message-Id: Sender: owner-linux-mm@kvack.org To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: linux-man@vger.kernel.org, mtk.manpages@gmail.com, Eric B Munson List-ID: This patch set adds a flag to mmap that allows the user to request a mapping to be backed with huge pages. This mapping will borrow functionality from the huge page shm code to create a file on the kernel internal mount and uses it to approximate an anonymous mapping. The MAP_LARGEPAGE flag is a modifier to MAP_ANONYMOUS and will not work without both flags being preset. A new flag is necessary because there is no other way to hook into huge pages without creating a file on a hugetlbfs mount which wouldn't be MAP_ANONYMOUS. To userspace, this mapping will behave just like an anonymous mapping because the file is not accessible outside of the kernel. Eric B Munson (3): hugetlbfs: Allow the creation of files suitable for MAP_PRIVATE on the vfs internal mount Add MAP_LARGEPAGE for mmaping pseudo-anonymous huge page regions Add MAP_LARGEPAGE example to vm/hugetlbpage.txt Documentation/vm/hugetlbpage.txt | 80 +++++++++++++++++++++++++++++++++++++ fs/hugetlbfs/inode.c | 22 ++++++++-- include/asm-generic/mman-common.h | 1 + include/linux/hugetlb.h | 17 +++++++- ipc/shm.c | 3 +- mm/mmap.c | 16 +++++++ 6 files changed, 133 insertions(+), 6 deletions(-) -- 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