From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ob0-f200.google.com (mail-ob0-f200.google.com [209.85.214.200]) by kanga.kvack.org (Postfix) with ESMTP id F34268294C for ; Mon, 6 Jun 2016 10:08:17 -0400 (EDT) Received: by mail-ob0-f200.google.com with SMTP id d10so34383410oby.1 for ; Mon, 06 Jun 2016 07:08:17 -0700 (PDT) Received: from mga04.intel.com (mga04.intel.com. [192.55.52.120]) by mx.google.com with ESMTP id zq1si26855288pac.130.2016.06.06.07.07.24 for ; Mon, 06 Jun 2016 07:07:24 -0700 (PDT) From: "Kirill A. Shutemov" Subject: [PATCHv9 12/32] thp: prepare change_huge_pmd() for file thp Date: Mon, 6 Jun 2016 17:06:49 +0300 Message-Id: <1465222029-45942-13-git-send-email-kirill.shutemov@linux.intel.com> In-Reply-To: <1465222029-45942-1-git-send-email-kirill.shutemov@linux.intel.com> References: <1465222029-45942-1-git-send-email-kirill.shutemov@linux.intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: Hugh Dickins , Andrea Arcangeli , Andrew Morton Cc: Dave Hansen , Vlastimil Babka , Christoph Lameter , Naoya Horiguchi , Jerome Marchand , Yang Shi , Sasha Levin , Andres Lagar-Cavilla , Ning Qu , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, "Kirill A. Shutemov" change_huge_pmd() has assert which is not relvant for file page. For shared mapping it's perfectly fine to have page table entry writable, without explicit mkwrite. Signed-off-by: Kirill A. Shutemov --- mm/huge_memory.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 32974dee4250..cc13e262dbe1 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1794,7 +1794,8 @@ int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, entry = pmd_mkwrite(entry); ret = HPAGE_PMD_NR; set_pmd_at(mm, addr, pmd, entry); - BUG_ON(!preserve_write && pmd_write(entry)); + BUG_ON(vma_is_anonymous(vma) && !preserve_write && + pmd_write(entry)); } spin_unlock(ptl); } -- 2.8.1 -- 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