From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <SRS0=7Z+k=KK=vger.kernel.org=linux-kernel-owner@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=-2.5 required=3.0 tests=MAILING_LIST_MULTI,SPF_PASS,
	USER_AGENT_MUTT 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 8FC33C28CF6
	for <linux-kernel@archiver.kernel.org>; Thu, 26 Jul 2018 06:06:47 +0000 (UTC)
Received: from vger.kernel.org (vger.kernel.org [209.132.180.67])
	by mail.kernel.org (Postfix) with ESMTP id 16C762089A
	for <linux-kernel@archiver.kernel.org>; Thu, 26 Jul 2018 06:06:47 +0000 (UTC)
DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 16C762089A
Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org
Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1728667AbeGZHV5 (ORCPT
        <rfc822;linux-kernel@archiver.kernel.org>);
        Thu, 26 Jul 2018 03:21:57 -0400
Received: from mx2.suse.de ([195.135.220.15]:50460 "EHLO mx1.suse.de"
        rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP
        id S1726837AbeGZHV5 (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
        Thu, 26 Jul 2018 03:21:57 -0400
X-Virus-Scanned: by amavisd-new at test-mx.suse.de
Received: from relay2.suse.de (unknown [195.135.220.254])
        by mx1.suse.de (Postfix) with ESMTP id 96155ADBB;
        Thu, 26 Jul 2018 06:06:42 +0000 (UTC)
Date:   Thu, 26 Jul 2018 08:06:40 +0200
From:   Michal Hocko <mhocko@kernel.org>
To:     "zhaowuyun@wingtech.com" <zhaowuyun@wingtech.com>
Cc:     akpm <akpm@linux-foundation.org>,
        mgorman <mgorman@techsingularity.net>,
        minchan <minchan@kernel.org>, vinmenon <vinmenon@codeaurora.org>,
        hannes <hannes@cmpxchg.org>,
        "hillf.zj" <hillf.zj@alibaba-inc.com>,
        linux-mm <linux-mm@kvack.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Hugh Dickins <hughd@google.com>
Subject: Re: Re: [PATCH] [PATCH] mm: disable preemption before swapcache_free
Message-ID: <20180726060640.GQ28386@dhcp22.suse.cz>
References: <2018072514375722198958@wingtech.com>
 <20180725141643.6d9ba86a9698bc2580836618@linux-foundation.org>
 <2018072610214038358990@wingtech.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <2018072610214038358990@wingtech.com>
User-Agent: Mutt/1.10.0 (2018-05-17)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Thu 26-07-18 10:21:40, zhaowuyun@wingtech.com wrote:
[...]
> Our project really needs a fix to this issue

Could you be more specific why? My understanding is that RT tasks
usually have all the memory mlocked otherwise all the real time
expectations are gone already.
-- 
Michal Hocko
SUSE Labs