Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754231Ab3IWMJi (ORCPT ); Mon, 23 Sep 2013 08:09:38 -0400 Received: from mga14.intel.com ([143.182.124.37]:25582 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753978Ab3IWMGO (ORCPT ); Mon, 23 Sep 2013 08:06:14 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.90,962,1371106800"; d="scan'208";a="298196487" From: "Kirill A. Shutemov" 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 , Ning Qu , Alexander Shishkin , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: [PATCHv6 21/22] thp, mm: split huge page on mmap file page Date: Mon, 23 Sep 2013 15:05:49 +0300 Message-Id: <1379937950-8411-22-git-send-email-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 1.8.4.rc3 In-Reply-To: <1379937950-8411-1-git-send-email-kirill.shutemov@linux.intel.com> References: <1379937950-8411-1-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: 947 Lines: 32 We are not ready to mmap file-backed tranparent huge pages. Let's split them on fault attempt. Later we'll implement mmap() properly and this code path be used for fallback cases. 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 9bbc024e4c..01a8f9945a 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -1736,6 +1736,8 @@ retry_find: goto no_cached_page; } + if (PageTransCompound(page)) + split_huge_page(compound_trans_head(page)); if (!lock_page_or_retry(page, vma->vm_mm, vmf->flags)) { page_cache_release(page); return ret | VM_FAULT_RETRY; -- 1.8.4.rc3 -- 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/