From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755324Ab3ELB1j (ORCPT ); Sat, 11 May 2013 21:27:39 -0400 Received: from mga01.intel.com ([192.55.52.88]:4397 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754691Ab3ELBVl (ORCPT ); Sat, 11 May 2013 21:21:41 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.87,654,1363158000"; d="scan'208";a="336134848" 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 , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: [PATCHv4 15/39] thp, mm: trigger bug in replace_page_cache_page() on THP Date: Sun, 12 May 2013 04:23:12 +0300 Message-Id: <1368321816-17719-16-git-send-email-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1368321816-17719-1-git-send-email-kirill.shutemov@linux.intel.com> References: <1368321816-17719-1-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" replace_page_cache_page() is only used by FUSE. It's unlikely that we will support THP in FUSE page cache any soon. Let's pospone implemetation of THP handling in replace_page_cache_page() until any will use it. 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 657ce82..3a03426 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -428,6 +428,8 @@ int replace_page_cache_page(struct page *old, struct page *new, gfp_t gfp_mask) { int error; + VM_BUG_ON(PageTransHuge(old)); + VM_BUG_ON(PageTransHuge(new)); VM_BUG_ON(!PageLocked(old)); VM_BUG_ON(!PageLocked(new)); VM_BUG_ON(new->mapping); -- 1.7.10.4