From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx152.postini.com [74.125.245.152]) by kanga.kvack.org (Postfix) with SMTP id A903B6B000E for ; Mon, 28 Jan 2013 04:23:38 -0500 (EST) From: "Kirill A. Shutemov" Subject: [PATCH, RFC 09/16] thp, mm: handle tail pages in page_cache_get_speculative() Date: Mon, 28 Jan 2013 11:24:21 +0200 Message-Id: <1359365068-10147-10-git-send-email-kirill.shutemov@linux.intel.com> 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: owner-linux-mm@kvack.org List-ID: 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" 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 0e38e13..1da2043 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -149,6 +149,9 @@ static inline int page_cache_get_speculative(struct page *page) { VM_BUG_ON(in_interrupt()); + if (unlikely(PageTail(page))) + return __get_page_tail(page); + #if !defined(CONFIG_SMP) && defined(CONFIG_TREE_RCU) # ifdef CONFIG_PREEMPT_COUNT VM_BUG_ON(!in_atomic()); @@ -175,7 +178,6 @@ 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, 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