Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934608Ab3CNR5a (ORCPT ); Thu, 14 Mar 2013 13:57:30 -0400 Received: from mga02.intel.com ([134.134.136.20]:49929 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758110Ab3CNRtQ (ORCPT ); Thu, 14 Mar 2013 13:49:16 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.84,845,1355126400"; d="scan'208";a="302267315" From: "Kirill A. Shutemov" To: Andrea Arcangeli , Andrew Morton , Al Viro , Hugh Dickins Cc: Wu Fengguang , Jan Kara , Mel Gorman , linux-mm@kvack.org, Andi Kleen , Matthew Wilcox , "Kirill A. Shutemov" , Hillf Danton , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: [PATCHv2, RFC 11/30] thp, mm: handle tail pages in page_cache_get_speculative() Date: Thu, 14 Mar 2013 19:50:16 +0200 Message-Id: <1363283435-7666-12-git-send-email-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1363283435-7666-1-git-send-email-kirill.shutemov@linux.intel.com> References: <1363283435-7666-1-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 Content-Length: 1141 Lines: 40 From: "Kirill A. Shutemov" For tail page we call __get_page_tail(). It has the same semantics, but for tail page. Signed-off-by: Kirill A. Shutemov --- include/linux/pagemap.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 3521b0d..408c4e3 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -159,6 +159,9 @@ static inline int page_cache_get_speculative(struct page *page) { VM_BUG_ON(in_interrupt()); + if (unlikely(PageTail(page))) + return __get_page_tail(page); + #ifdef CONFIG_TINY_RCU # ifdef CONFIG_PREEMPT_COUNT VM_BUG_ON(!in_atomic()); @@ -185,7 +188,6 @@ static inline int page_cache_get_speculative(struct page *page) return 0; } #endif - VM_BUG_ON(PageTail(page)); return 1; } -- 1.7.10.4 -- 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/