Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936095AbaFIQHo (ORCPT ); Mon, 9 Jun 2014 12:07:44 -0400 Received: from mga01.intel.com ([192.55.52.88]:13348 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933588AbaFIQEd (ORCPT ); Mon, 9 Jun 2014 12:04:33 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.98,1003,1392192000"; d="scan'208";a="545246548" From: "Kirill A. Shutemov" To: Andrew Morton , Andrea Arcangeli Cc: Dave Hansen , Hugh Dickins , Mel Gorman , Rik van Riel , Vlastimil Babka , linux-kernel@vger.kernel.org, linux-mm@kvack.org, "Kirill A. Shutemov" Subject: [PATCH, RFC 02/10] mm: change PageAnon() to work on tail pages Date: Mon, 9 Jun 2014 19:04:13 +0300 Message-Id: <1402329861-7037-3-git-send-email-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.0.0.rc4 In-Reply-To: <1402329861-7037-1-git-send-email-kirill.shutemov@linux.intel.com> References: <1402329861-7037-1-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 Current PageAnon() is always return false for tail. We need to look on head page for correct answer. Let's change the function to give the right result. Signed-off-by: Kirill A. Shutemov --- include/linux/mm.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/linux/mm.h b/include/linux/mm.h index 9f4960bf505b..a60e2db5f9f9 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -983,6 +983,7 @@ struct address_space *page_file_mapping(struct page *page) static inline int PageAnon(struct page *page) { + page = compound_head(page); return ((unsigned long)page->mapping & PAGE_MAPPING_ANON) != 0; } -- 2.0.0.rc4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/