From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <SRS0=5JFc=NX=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=-3.8 required=3.0 tests=BAYES_00,
	HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS
	autolearn=no 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 EEE11C432BE
	for <linux-mm@archiver.kernel.org>; Wed,  1 Sep 2021 04:55:08 +0000 (UTC)
Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17])
	by mail.kernel.org (Postfix) with ESMTP id 79844600CC
	for <linux-mm@archiver.kernel.org>; Wed,  1 Sep 2021 04:55:08 +0000 (UTC)
DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 79844600CC
Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=zeniv.linux.org.uk
Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org
Received: by kanga.kvack.org (Postfix)
	id C7AD78D0001; Wed,  1 Sep 2021 00:55:07 -0400 (EDT)
Received: by kanga.kvack.org (Postfix, from userid 40)
	id C01216B0071; Wed,  1 Sep 2021 00:55:07 -0400 (EDT)
X-Delivered-To: int-list-linux-mm@kvack.org
Received: by kanga.kvack.org (Postfix, from userid 63042)
	id AC9808D0001; Wed,  1 Sep 2021 00:55:07 -0400 (EDT)
X-Delivered-To: linux-mm@kvack.org
Received: from forelay.hostedemail.com (smtprelay0163.hostedemail.com [216.40.44.163])
	by kanga.kvack.org (Postfix) with ESMTP id 9EF5B6B006C
	for <linux-mm@kvack.org>; Wed,  1 Sep 2021 00:55:07 -0400 (EDT)
Received: from smtpin34.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251])
	by forelay02.hostedemail.com (Postfix) with ESMTP id 425821455D
	for <linux-mm@kvack.org>; Wed,  1 Sep 2021 04:55:07 +0000 (UTC)
X-FDA: 78537790254.34.DA99D25
Received: from zeniv-ca.linux.org.uk (zeniv-ca.linux.org.uk [142.44.231.140])
	by imf24.hostedemail.com (Postfix) with ESMTP id 01F9AB0000A2
	for <linux-mm@kvack.org>; Wed,  1 Sep 2021 04:55:06 +0000 (UTC)
Received: from viro by zeniv-ca.linux.org.uk with local (Exim 4.94.2 #2 (Red Hat Linux))
	id 1mLIH7-00092F-SR; Wed, 01 Sep 2021 04:55:02 +0000
Date: Wed, 1 Sep 2021 04:55:01 +0000
From: Al Viro <viro@zeniv.linux.org.uk>
To: Shijie Huang <shijie@amperemail.onmicrosoft.com>
Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org,
	linux-mm@kvack.org, song.bao.hua@hisilicon.com,
	linux-kernel@vger.kernel.org,
	Frank Wang <zwang@amperecomputing.com>
Subject: Re: Is it possible to implement the per-node page cache for
 programs/libraries?
Message-ID: <YS8HpUz9FUcFWt0V@zeniv-ca.linux.org.uk>
References: <a2f423cf-9413-6bc8-e4d8-92374fc0449e@amperemail.onmicrosoft.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inline
In-Reply-To: <a2f423cf-9413-6bc8-e4d8-92374fc0449e@amperemail.onmicrosoft.com>
X-Rspamd-Queue-Id: 01F9AB0000A2
Authentication-Results: imf24.hostedemail.com;
	dkim=none;
	dmarc=none;
	spf=none (imf24.hostedemail.com: domain of viro@ftp.linux.org.uk has no SPF policy when checking 142.44.231.140) smtp.mailfrom=viro@ftp.linux.org.uk
X-Rspamd-Server: rspam01
X-Stat-Signature: zizgfwxr8d18uws7o9r4fpt8g9zzfzkf
X-HE-Tag: 1630472106-120142
Content-Transfer-Encoding: quoted-printable
X-Bogosity: Ham, tests=bogofilter, spamicity=0.002044, 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 Wed, Sep 01, 2021 at 11:07:41AM +0800, Shijie Huang wrote:
> Hi Everyone,
>=20
> =A0=A0=A0 In the NUMA, we only have one page cache for each file. For t=
he
> program/shared libraries, the
>=20
> remote-access delays longer then the=A0 local-access.
>=20
> So, is it possible to implement the per-node page cache for
> programs/libraries?

What do you mean, per-node page cache?  Multiple pages for the same
area of file?  That'd be bloody awful on coherency...