From patchwork Thu Jan 26 11:57:58 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kirill A . Shutemov" X-Patchwork-Id: 9539125 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 0C296601D7 for ; Thu, 26 Jan 2017 12:07:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0269927D13 for ; Thu, 26 Jan 2017 12:07:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EA6B42819A; Thu, 26 Jan 2017 12:07:49 +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 629C027D13 for ; Thu, 26 Jan 2017 12:07:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753134AbdAZL66 (ORCPT ); Thu, 26 Jan 2017 06:58:58 -0500 Received: from mga04.intel.com ([192.55.52.120]:7941 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752916AbdAZL64 (ORCPT ); Thu, 26 Jan 2017 06:58:56 -0500 Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga104.fm.intel.com with ESMTP; 26 Jan 2017 03:58:46 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.33,289,1477983600"; d="scan'208";a="813549853" Received: from black.fi.intel.com ([10.237.72.28]) by FMSMGA003.fm.intel.com with ESMTP; 26 Jan 2017 03:58:42 -0800 Received: by black.fi.intel.com (Postfix, from userid 1000) id DBCFF37E; Thu, 26 Jan 2017 13:58:25 +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: [PATCHv6 16/37] thp: make thp_get_unmapped_area() respect S_HUGE_MODE Date: Thu, 26 Jan 2017 14:57:58 +0300 Message-Id: <20170126115819.58875-17-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170126115819.58875-1-kirill.shutemov@linux.intel.com> References: <20170126115819.58875-1-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 We want mmap(NULL) to return PMD-aligned address if the inode can have huge pages in page cache. Signed-off-by: Kirill A. Shutemov Reviewed-by: Matthew Wilcox --- mm/huge_memory.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 55aee62e8444..2b1d8d13e2c3 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -528,10 +528,12 @@ unsigned long thp_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) { loff_t off = (loff_t)pgoff << PAGE_SHIFT; + struct inode *inode = filp->f_mapping->host; if (addr) goto out; - if (!IS_DAX(filp->f_mapping->host) || !IS_ENABLED(CONFIG_FS_DAX_PMD)) + if ((inode->i_flags & S_HUGE_MODE) == S_HUGE_NEVER && + (!IS_DAX(inode) || !IS_ENABLED(CONFIG_FS_DAX_PMD))) goto out; addr = __thp_get_unmapped_area(filp, len, off, flags, PMD_SIZE);