From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <SRS0=pR5i=FH=kvack.org=owner-linux-mm@kernel.org>
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on
	aws-us-west-2-korg-lkml-1.web.codeaurora.org
X-Spam-Level: 
X-Spam-Status: No, score=-18.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH,
	DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,
	INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A,
	SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham
	autolearn_force=no version=3.4.0
Received: from mail.kernel.org (mail.kernel.org [198.145.29.99])
	by smtp.lore.kernel.org (Postfix) with ESMTP id 5BA89C64E7B
	for <linux-mm@archiver.kernel.org>; Thu,  3 Dec 2020 08:01:41 +0000 (UTC)
Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17])
	by mail.kernel.org (Postfix) with ESMTP id C2DDC20C56
	for <linux-mm@archiver.kernel.org>; Thu,  3 Dec 2020 08:01:40 +0000 (UTC)
DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C2DDC20C56
Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nvidia.com
Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org
Received: by kanga.kvack.org (Postfix)
	id 290C06B0068; Thu,  3 Dec 2020 03:01:40 -0500 (EST)
Received: by kanga.kvack.org (Postfix, from userid 40)
	id 240246B006C; Thu,  3 Dec 2020 03:01:40 -0500 (EST)
X-Delivered-To: int-list-linux-mm@kvack.org
Received: by kanga.kvack.org (Postfix, from userid 63042)
	id 1303D6B006E; Thu,  3 Dec 2020 03:01:40 -0500 (EST)
X-Delivered-To: linux-mm@kvack.org
Received: from forelay.hostedemail.com (smtprelay0024.hostedemail.com [216.40.44.24])
	by kanga.kvack.org (Postfix) with ESMTP id EDB8A6B0068
	for <linux-mm@kvack.org>; Thu,  3 Dec 2020 03:01:39 -0500 (EST)
Received: from smtpin10.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251])
	by forelay02.hostedemail.com (Postfix) with ESMTP id ADB833629
	for <linux-mm@kvack.org>; Thu,  3 Dec 2020 08:01:39 +0000 (UTC)
X-FDA: 77551226718.10.ants20_1905e1b273ba
Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251])
	by smtpin10.hostedemail.com (Postfix) with ESMTP id 8389216A0DD
	for <linux-mm@kvack.org>; Thu,  3 Dec 2020 08:01:39 +0000 (UTC)
X-HE-Tag: ants20_1905e1b273ba
X-Filterd-Recvd-Size: 3844
Received: from hqnvemgate26.nvidia.com (hqnvemgate26.nvidia.com [216.228.121.65])
	by imf08.hostedemail.com (Postfix) with ESMTP
	for <linux-mm@kvack.org>; Thu,  3 Dec 2020 08:01:38 +0000 (UTC)
Received: from hqmail.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate26.nvidia.com (using TLS: TLSv1.2, AES256-SHA)
	id <B5fc89b610000>; Thu, 03 Dec 2020 00:01:37 -0800
Received: from [10.2.53.244] (10.124.1.5) by HQMAIL107.nvidia.com
 (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Thu, 3 Dec
 2020 08:01:28 +0000
Subject: Re: [PATCH 2/6] mm/gup: don't pin migrated cma pages in movable zone
To: Pavel Tatashin <pasha.tatashin@soleen.com>,
	<linux-kernel@vger.kernel.org>, <linux-mm@kvack.org>,
	<akpm@linux-foundation.org>, <vbabka@suse.cz>, <mhocko@suse.com>,
	<david@redhat.com>, <osalvador@suse.de>, <dan.j.williams@intel.com>,
	<sashal@kernel.org>, <tyhicks@linux.microsoft.com>, <iamjoonsoo.kim@lge.com>,
	<mike.kravetz@oracle.com>, <rostedt@goodmis.org>, <mingo@redhat.com>,
	<jgg@ziepe.ca>, <peterz@infradead.org>, <mgorman@suse.de>,
	<willy@infradead.org>, <rientjes@google.com>
References: <20201202052330.474592-1-pasha.tatashin@soleen.com>
 <20201202052330.474592-3-pasha.tatashin@soleen.com>
From: John Hubbard <jhubbard@nvidia.com>
Message-ID: <2d383ee6-c5ab-48b6-3ccd-e32d211e01e3@nvidia.com>
Date: Thu, 3 Dec 2020 00:01:28 -0800
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:83.0) Gecko/20100101
 Thunderbird/83.0
MIME-Version: 1.0
In-Reply-To: <20201202052330.474592-3-pasha.tatashin@soleen.com>
Content-Type: text/plain; charset="UTF-8"; format=flowed
Content-Language: en-US
Content-Transfer-Encoding: 7bit
X-Originating-IP: [10.124.1.5]
X-ClientProxiedBy: HQMAIL105.nvidia.com (172.20.187.12) To
 HQMAIL107.nvidia.com (172.20.187.13)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1;
	t=1606982497; bh=c1Tc1OG4/I/r3ZS+i1ed5+AnAPKp5CQ+Qg1jawue+8c=;
	h=Subject:To:References:From:Message-ID:Date:User-Agent:
	 MIME-Version:In-Reply-To:Content-Type:Content-Language:
	 Content-Transfer-Encoding:X-Originating-IP:X-ClientProxiedBy;
	b=EzVNbehbvE3qNEc0OOEjfoujFjnOu8xH3LcP0/TZ5jun/kyBwOstVRqdjO5aVnKYm
	 XbP0eLqahbs9nBp7PdsnNGtShwKYHIKtdCX2ggxPaoA0p9CJXD5JfSUa76Js0bYw0R
	 tN02uxY+Gaqr0hdzXV/V2QPVmHmHqpxw9JVIYC7yg3rQZAyTyvsss/l8cMZfFgb1Vc
	 H/Mc3v4PkvxxknFORKxcqE3TNF4UX3Lw9nTfaI0RLlIrcPfjYIkjyqBzJ+4clY7Ncv
	 qX8D+FZC2XItbVFfNInfIxEF6Z0pFWNZAaAuo1gNy3T+j/I5TRy/gFlPhZJgtg4SAB
	 7bHefGL0F5vKg==
X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4
Sender: owner-linux-mm@kvack.org
Precedence: bulk
X-Loop: owner-majordomo@kvack.org
List-ID: <linux-mm.kvack.org>

On 12/1/20 9:23 PM, Pavel Tatashin wrote:
> In order not to fragment CMA the pinned pages are migrated. However,
> they are migrated to ZONE_MOVABLE, which also should not have pinned pages.
> 
> Remove __GFP_MOVABLE, so pages can be migrated to zones where pinning
> is allowed.
> 
> Signed-off-by: Pavel Tatashin <pasha.tatashin@soleen.com>
> ---
>   mm/gup.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/gup.c b/mm/gup.c
> index cdb8b9eeb016..3a76c005a3e2 100644
> --- a/mm/gup.c
> +++ b/mm/gup.c
> @@ -1610,7 +1610,7 @@ static long check_and_migrate_cma_pages(struct mm_struct *mm,
>   	long ret = nr_pages;
>   	struct migration_target_control mtc = {
>   		.nid = NUMA_NO_NODE,
> -		.gfp_mask = GFP_USER | __GFP_MOVABLE | __GFP_NOWARN,
> +		.gfp_mask = GFP_USER | __GFP_NOWARN,
>   	};
>   
>   check_again:
> 

Reviewed-by: John Hubbard <jhubbard@nvidia.com>

...while I was here, I noticed this, which is outside the scope of your patchset, but
I thought I'd just mention it anyway in case anyone cares:

static inline bool is_migrate_movable(int mt)
{
	return is_migrate_cma(mt) || mt == MIGRATE_MOVABLE;
}

...that really should take an "enum migratetype mt" instead of an int, I think.

thanks,
-- 
John Hubbard
NVIDIA