From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Kirill A. Shutemov" Subject: [PATCHv3, RFC 15/34] thp, mm: handle tail pages in page_cache_get_speculative() Date: Fri, 5 Apr 2013 14:59:39 +0300 Message-ID: <1365163198-29726-16-git-send-email-kirill.shutemov@linux.intel.com> References: <1365163198-29726-1-git-send-email-kirill.shutemov@linux.intel.com> 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" To: Andrea Arcangeli , Andrew Morton Return-path: Received: from mga02.intel.com ([134.134.136.20]:26836 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161600Ab3DEL62 (ORCPT ); Fri, 5 Apr 2013 07:58:28 -0400 In-Reply-To: <1365163198-29726-1-git-send-email-kirill.shutemov@linux.intel.com> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: 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 56debde..bd07fc1 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -160,6 +160,9 @@ 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()); @@ -186,7 +189,6 @@ static inline int page_cache_get_speculative(struct page *page) return 0; } #endif - VM_BUG_ON(PageTail(page)); return 1; } -- 1.7.10.4