From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: 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=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 0FAD4C4727F for ; Thu, 1 Oct 2020 21:56:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D6D8E206C9 for ; Thu, 1 Oct 2020 21:56:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733177AbgJAV4J (ORCPT ); Thu, 1 Oct 2020 17:56:09 -0400 Received: from elvis.franken.de ([193.175.24.41]:39086 "EHLO elvis.franken.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726855AbgJAV4J (ORCPT ); Thu, 1 Oct 2020 17:56:09 -0400 Received: from uucp (helo=alpha) by elvis.franken.de with local-bsmtp (Exim 3.36 #1) id 1kO6YQ-0005Yq-00; Thu, 01 Oct 2020 23:55:58 +0200 Received: by alpha.franken.de (Postfix, from userid 1000) id 7C95DC1051; Thu, 1 Oct 2020 23:55:48 +0200 (CEST) Date: Thu, 1 Oct 2020 23:55:48 +0200 From: Thomas Bogendoerfer To: Zhou Yanjie Cc: "open list:MIPS" , linux-kernel Subject: Re: Kernel 5.9-rc regression. Message-ID: <20201001215548.GA21328@alpha.franken.de> References: <25b6a64b-b5ac-c85a-abde-909fb2d768f9@wanyeetech.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <25b6a64b-b5ac-c85a-abde-909fb2d768f9@wanyeetech.com> User-Agent: Mutt/1.5.23 (2014-03-12) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Oct 02, 2020 at 04:15:43AM +0800, Zhou Yanjie wrote: > Hi Thomas and list, > > There is a strange phenomenon in kernel 5.9-rc: when using kernel 5.9-rc > with debian 10 and running htop, the memory footprint will be displayed as > 3.99T. When the actual memory footprint increases, the displayed value will > be reduced to 3.98T, 3.97T etc. These phenomena have been confirmed in > X1000, X1830, and JZ4780 (disable SMP), this phenomenon does not seem to > affect the SMP processor. When the JZ4780 turn on SMP, the memory footprint > will be displayed normally. try this fix https://lore.kernel.org/lkml/20201001203931.GD2706729@carbon.DHCP.thefacebook.com/ Thomas. -- Crap can work. Given enough thrust pigs will fly, but it's not necessarily a good idea. [ RFC1925, 2.3 ]