From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <owner-linux-mm@kvack.org>
Received: from psmtp.com (na3sys010amx139.postini.com [74.125.245.139])
	by kanga.kvack.org (Postfix) with SMTP id F15CB6B0031
	for <linux-mm@kvack.org>; Tue, 30 Jul 2013 14:32:37 -0400 (EDT)
Received: from /spool/local
	by e28smtp01.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted
	for <linux-mm@kvack.org> from <aneesh.kumar@linux.vnet.ibm.com>;
	Tue, 30 Jul 2013 23:54:25 +0530
Received: from d28relay03.in.ibm.com (d28relay03.in.ibm.com [9.184.220.60])
	by d28dlp01.in.ibm.com (Postfix) with ESMTP id CA74AE004F
	for <linux-mm@kvack.org>; Wed, 31 Jul 2013 00:02:39 +0530 (IST)
Received: from d28av03.in.ibm.com (d28av03.in.ibm.com [9.184.220.65])
	by d28relay03.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r6UIXWeL44105898
	for <linux-mm@kvack.org>; Wed, 31 Jul 2013 00:03:32 +0530
Received: from d28av03.in.ibm.com (loopback [127.0.0.1])
	by d28av03.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r6UIWVSE018777
	for <linux-mm@kvack.org>; Wed, 31 Jul 2013 04:32:32 +1000
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: Re: [PATCH 8/8] prepare to remove /proc/sys/vm/hugepages_treat_as_movable
In-Reply-To: <1374728103-17468-9-git-send-email-n-horiguchi@ah.jp.nec.com>
References: <1374728103-17468-1-git-send-email-n-horiguchi@ah.jp.nec.com> <1374728103-17468-9-git-send-email-n-horiguchi@ah.jp.nec.com>
Date: Wed, 31 Jul 2013 00:02:30 +0530
Message-ID: <87k3k7q4ox.fsf@linux.vnet.ibm.com>
MIME-Version: 1.0
Content-Type: text/plain
Sender: owner-linux-mm@kvack.org
List-ID: <linux-mm.kvack.org>
To: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>, Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org
Cc: Mel Gorman <mgorman@suse.de>, Hugh Dickins <hughd@google.com>, KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>, Andi Kleen <andi@firstfloor.org>, Hillf Danton <dhillf@gmail.com>, Michal Hocko <mhocko@suse.cz>, Rik van Riel <riel@redhat.com>, Wanpeng Li <liwanp@linux.vnet.ibm.com>, linux-kernel@vger.kernel.org, Naoya Horiguchi <nao.horiguchi@gmail.com>

Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> writes:

> Now hugepages are definitely movable. So allocating hugepages from
> ZONE_MOVABLE is natural and we have no reason to keep this parameter.
> In order to allow userspace to prepare for the removal, let's leave
> this sysctl handler as noop for a while.

I guess you still need to handle architectures for which pmd_huge is

int pmd_huge(pmd_t pmd)
{
	return 0;
}

embedded powerpc is one. They don't store pte information at the PMD
level. Instead pmd contains a pointer to hugepage directory which
contain huge pte.

-aneesh

--
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: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>