From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755138AbbIXOve (ORCPT ); Thu, 24 Sep 2015 10:51:34 -0400 Received: from mga02.intel.com ([134.134.136.20]:23109 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754771AbbIXOvb (ORCPT ); Thu, 24 Sep 2015 10:51:31 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,581,1437462000"; d="scan'208";a="567712737" From: "Kirill A. Shutemov" To: Andrew Morton Cc: Andrea Arcangeli , Hugh Dickins , Dave Hansen , Mel Gorman , Rik van Riel , Vlastimil Babka , Christoph Lameter , Naoya Horiguchi , Steve Capper , "Aneesh Kumar K.V" , Johannes Weiner , Michal Hocko , Jerome Marchand , Sasha Levin , linux-kernel@vger.kernel.org, linux-mm@kvack.org, "Kirill A. Shutemov" Subject: [PATCH 08/16] page-flags: define behavior of Xen-related flags on compound pages Date: Thu, 24 Sep 2015 17:50:56 +0300 Message-Id: <1443106264-78075-9-git-send-email-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.5.1 In-Reply-To: <1443106264-78075-1-git-send-email-kirill.shutemov@linux.intel.com> References: <20150921153509.fef7ecdf313ef74307c43b65@linux-foundation.org> <1443106264-78075-1-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 PG_pinned and PG_savepinned are about page table's pages which are never compound. I'm not so sure about PG_foreign, but it seems we shouldn't see compound pages there too. Let's use PF_NO_COMPOUND for all of them. Signed-off-by: Kirill A. Shutemov --- include/linux/page-flags.h | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index c9cd82310e2d..adaa2b39f471 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -257,9 +257,13 @@ PAGEFLAG(Active, active, PF_HEAD) __CLEARPAGEFLAG(Active, active, PF_HEAD) __PAGEFLAG(Slab, slab, PF_NO_TAIL) __PAGEFLAG(SlobFree, slob_free, PF_NO_TAIL) PAGEFLAG(Checked, checked, PF_NO_COMPOUND) /* Used by some filesystems */ -PAGEFLAG(Pinned, pinned, PF_ANY) TESTSCFLAG(Pinned, pinned, PF_ANY) /* Xen */ -PAGEFLAG(SavePinned, savepinned, PF_ANY); /* Xen */ -PAGEFLAG(Foreign, foreign, PF_ANY); /* Xen */ + +/* Xen */ +PAGEFLAG(Pinned, pinned, PF_NO_COMPOUND) + TESTSCFLAG(Pinned, pinned, PF_NO_COMPOUND) +PAGEFLAG(SavePinned, savepinned, PF_NO_COMPOUND); +PAGEFLAG(Foreign, foreign, PF_NO_COMPOUND); + PAGEFLAG(Reserved, reserved, PF_ANY) __CLEARPAGEFLAG(Reserved, reserved, PF_ANY) PAGEFLAG(SwapBacked, swapbacked, PF_ANY) __CLEARPAGEFLAG(SwapBacked, swapbacked, PF_ANY) -- 2.5.1