From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756805Ab3A1JYm (ORCPT ); Mon, 28 Jan 2013 04:24:42 -0500 Received: from mga01.intel.com ([192.55.52.88]:26134 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756484Ab3A1JXl (ORCPT ); Mon, 28 Jan 2013 04:23:41 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.84,550,1355126400"; d="scan'208";a="282975167" From: "Kirill A. Shutemov" To: Andrea Arcangeli , Andrew Morton , Al Viro Cc: Wu Fengguang , Jan Kara , Mel Gorman , linux-mm@kvack.org, Andi Kleen , Matthew Wilcox , "Kirill A. Shutemov" , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: [PATCH, RFC 15/16] thp, mm: split huge page on mmap file page Date: Mon, 28 Jan 2013 11:24:27 +0200 Message-Id: <1359365068-10147-16-git-send-email-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1359365068-10147-1-git-send-email-kirill.shutemov@linux.intel.com> References: <1359365068-10147-1-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" We are not ready to mmap file-backed tranparent huge pages. Let's split them on mmap() attempt. Signed-off-by: Kirill A. Shutemov --- mm/filemap.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/filemap.c b/mm/filemap.c index a7331fb..2e08582 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1692,6 +1692,8 @@ retry_find: goto no_cached_page; } + if (PageTransCompound(page)) + split_huge_page(page); if (!lock_page_or_retry(page, vma->vm_mm, vmf->flags)) { page_cache_release(page); return ret | VM_FAULT_RETRY; -- 1.7.10.4