From patchwork Tue Nov 29 11:22:55 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kirill A . Shutemov" X-Patchwork-Id: 9451655 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 9170760710 for ; Tue, 29 Nov 2016 11:31:42 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 766E9281A7 for ; Tue, 29 Nov 2016 11:31:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6A954281C3; Tue, 29 Nov 2016 11:31:42 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1CE95281A7 for ; Tue, 29 Nov 2016 11:31:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757467AbcK2Lbj (ORCPT ); Tue, 29 Nov 2016 06:31:39 -0500 Received: from mga06.intel.com ([134.134.136.31]:17143 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757263AbcK2LXm (ORCPT ); Tue, 29 Nov 2016 06:23:42 -0500 Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga104.jf.intel.com with ESMTP; 29 Nov 2016 03:23:41 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.31,568,1473145200"; d="scan'208";a="1065622694" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga001.jf.intel.com with ESMTP; 29 Nov 2016 03:23:36 -0800 Received: by black.fi.intel.com (Postfix, from userid 1000) id 3E72ABEB; Tue, 29 Nov 2016 13:23:13 +0200 (EET) From: "Kirill A. Shutemov" To: "Theodore Ts'o" , Andreas Dilger , Jan Kara , Andrew Morton Cc: Alexander Viro , Hugh Dickins , Andrea Arcangeli , Dave Hansen , Vlastimil Babka , Matthew Wilcox , Ross Zwisler , linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-block@vger.kernel.org, "Kirill A. Shutemov" Subject: [PATCHv5 27/36] ext4: handle huge pages in __ext4_block_zero_page_range() Date: Tue, 29 Nov 2016 14:22:55 +0300 Message-Id: <20161129112304.90056-28-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.10.2 In-Reply-To: <20161129112304.90056-1-kirill.shutemov@linux.intel.com> References: <20161129112304.90056-1-kirill.shutemov@linux.intel.com> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP As the function handles zeroing range only within one block, the required changes are trivial, just remove assuption on page size. Signed-off-by: Kirill A. Shutemov --- fs/ext4/inode.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 387aa857770b..d3143dfe9962 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -3776,7 +3776,7 @@ static int __ext4_block_zero_page_range(handle_t *handle, struct address_space *mapping, loff_t from, loff_t length) { ext4_fsblk_t index = from >> PAGE_SHIFT; - unsigned offset = from & (PAGE_SIZE-1); + unsigned offset; unsigned blocksize, pos; ext4_lblk_t iblock; struct inode *inode = mapping->host; @@ -3789,6 +3789,9 @@ static int __ext4_block_zero_page_range(handle_t *handle, if (!page) return -ENOMEM; + page = compound_head(page); + offset = from & ~hpage_mask(page); + blocksize = inode->i_sb->s_blocksize; iblock = index << (PAGE_SHIFT - inode->i_sb->s_blocksize_bits); @@ -3845,7 +3848,7 @@ static int __ext4_block_zero_page_range(handle_t *handle, if (err) goto unlock; } - zero_user(page, offset, length); + zero_user(page + offset / PAGE_SIZE, offset % PAGE_SIZE, length); BUFFER_TRACE(bh, "zeroed end of block"); if (ext4_should_journal_data(inode)) {