From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754283Ab3HDCQM (ORCPT ); Sat, 3 Aug 2013 22:16:12 -0400 Received: from mga03.intel.com ([143.182.124.21]:38715 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753549Ab3HDCOg (ORCPT ); Sat, 3 Aug 2013 22:14:36 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.89,810,1367996400"; d="scan'208";a="341280883" From: "Kirill A. Shutemov" To: Andrea Arcangeli , Andrew Morton Cc: Al Viro , Hugh Dickins , Wu Fengguang , Jan Kara , Mel Gorman , linux-mm@kvack.org, Andi Kleen , Matthew Wilcox , "Kirill A. Shutemov" , Hillf Danton , Dave Hansen , Ning Qu , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: [PATCH 23/23] ramfs: enable transparent huge page cache Date: Sun, 4 Aug 2013 05:17:25 +0300 Message-Id: <1375582645-29274-24-git-send-email-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1375582645-29274-1-git-send-email-kirill.shutemov@linux.intel.com> References: <1375582645-29274-1-git-send-email-kirill.shutemov@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Kirill A. Shutemov" ramfs is the most simple fs from page cache point of view. Let's start transparent huge page cache enabling here. ramfs pages are not movable[1] and switching to transhuge pages doesn't affect that. We need to fix this eventually. [1] http://lkml.org/lkml/2013/4/2/720 Signed-off-by: Kirill A. Shutemov --- fs/ramfs/file-mmu.c | 3 ++- fs/ramfs/inode.c | 6 +++++- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/fs/ramfs/file-mmu.c b/fs/ramfs/file-mmu.c index 4884ac5..3236e41 100644 --- a/fs/ramfs/file-mmu.c +++ b/fs/ramfs/file-mmu.c @@ -32,7 +32,7 @@ const struct address_space_operations ramfs_aops = { .readpage = simple_readpage, - .write_begin = simple_write_begin, + .write_begin = simple_thp_write_begin, .write_end = simple_write_end, .set_page_dirty = __set_page_dirty_no_writeback, }; @@ -47,6 +47,7 @@ const struct file_operations ramfs_file_operations = { .splice_read = generic_file_splice_read, .splice_write = generic_file_splice_write, .llseek = generic_file_llseek, + .release = simple_thp_release, }; const struct inode_operations ramfs_file_inode_operations = { diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c index 39d1465..5dafdfc 100644 --- a/fs/ramfs/inode.c +++ b/fs/ramfs/inode.c @@ -61,7 +61,11 @@ struct inode *ramfs_get_inode(struct super_block *sb, inode_init_owner(inode, dir, mode); inode->i_mapping->a_ops = &ramfs_aops; inode->i_mapping->backing_dev_info = &ramfs_backing_dev_info; - mapping_set_gfp_mask(inode->i_mapping, GFP_HIGHUSER); + /* + * TODO: make ramfs pages movable + */ + mapping_set_gfp_mask(inode->i_mapping, + GFP_TRANSHUGE & ~__GFP_MOVABLE); mapping_set_unevictable(inode->i_mapping); inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; switch (mode & S_IFMT) { -- 1.8.3.2