From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx160.postini.com [74.125.245.160]) by kanga.kvack.org (Postfix) with SMTP id ACECD6B007B for ; Sat, 11 May 2013 21:21:41 -0400 (EDT) From: "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> 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: owner-linux-mm@kvack.org List-ID: 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" 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org