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=-2.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 D8EC8C43603 for ; Wed, 11 Dec 2019 14:40:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A2CD0214D8 for ; Wed, 11 Dec 2019 14:40:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576075223; bh=qxSM7j8YWMNBv+etg8vjUZxp/0iLoNv+DuxrIYqvrvw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=fk2dOnB3QpHB1UuMrsrFd+GuuIg8I4lhCnKsIwHEemq7eajklBivpcXsIfJdDW7uH IRO/N+hbw81QAnBL2CtNkdKmhLt6hf6G6aL8hKjMIevLpesGhurUq/gTwhwnmEmkAh DhEXBTYXBX0ayePEL/vY6fGkFIm8oedMAEIeDqCg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730009AbfLKOkW (ORCPT ); Wed, 11 Dec 2019 09:40:22 -0500 Received: from mail-wm1-f68.google.com ([209.85.128.68]:40856 "EHLO mail-wm1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729829AbfLKOkW (ORCPT ); Wed, 11 Dec 2019 09:40:22 -0500 Received: by mail-wm1-f68.google.com with SMTP id t14so7212347wmi.5; Wed, 11 Dec 2019 06:40:20 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=6LV1fwVOyA4k6YB/7k6OFVrgJLqJ3K+42hjVJ8NocJk=; b=NTj1/R3FZHjfx6woRfFzMJyY4UniShJESW7YwqEMB1nw3Qi6sl20Bhto3EeipxXSNb vVtSsjfE6AzgVEpMDKK18JDp7I2vciEgZel2zM+f5e35YRZqZPL1VbsQBMDyErJ1HvsM FvPAzRmXB42abqyxFjtNh/gdGNF0R/fUx9TIXbP7Cbe3hguB2wZzGW5zgESQACnOQJ7p D9Zp6nVjRWkAX0At/AmoEZCIq60KBNrPvk7ERJB+sPpL2Li5VB3GXMut++GkJUr/94tH WSIJS7YR1Rpy3YIQOyRKXetlmGwkHNSfW8/nXeTxnDx8NavD7bg1gceylRandwOdTeGZ IO6A== X-Gm-Message-State: APjAAAWg6bWsatMolsayehuPOraCVyA5xd6vhqyV7mNcRyMpuVItnQmA QcpEx1hkLlJvIuWuX95qiag= X-Google-Smtp-Source: APXvYqwy5+56DBmRmzDDxsDEqO4nVMY1hhpPtbXGeA9ujbnffW2eerK2zHxCYwCg5ZzGAUu1VGoGHA== X-Received: by 2002:a7b:c761:: with SMTP id x1mr113004wmk.37.1576075220183; Wed, 11 Dec 2019 06:40:20 -0800 (PST) Received: from localhost (prg-ext-pat.suse.com. [213.151.95.130]) by smtp.gmail.com with ESMTPSA id f207sm2029578wme.9.2019.12.11.06.40.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Dec 2019 06:40:19 -0800 (PST) Date: Wed, 11 Dec 2019 15:40:18 +0100 From: Michal Hocko To: "zhangyi (F)" Cc: linux-kernel@vger.kernel.org, akpm@linux-foundation.org, cl@linux.com, gregkh@linuxfoundation.org, mgalbraith@suse.de, torvalds@linux-foundation.org, umgwanakikbuti@gmail.com, wagi@monom.org, stable-commits@vger.kernel.org, "Wangkefeng (Maro)" , Xie XiuQi Subject: Re: Patch "mm, vmstat: make quiet_vmstat lighter" has been added to the 4.4-stable tree Message-ID: <20191211144018.GG14655@dhcp22.suse.cz> References: <156442332854185@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.12.2 (2019-09-21) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed 11-12-19 22:32:49, zhangyi (F) wrote: > Hi, all > > We find a performance degradation under lmbench af_unix[1] test case after > mergeing this patch on my x86 qemu 4.4 machine. The test result is basically > stable for each teses. > > Host machine: CPU: Intel(R) Xeon(R) CPU E5-2690 v3 > CPU(s): 48 > MEM: 193047 MB > > Guest machine: CPU: QEMU Virtual CPU version 2.5+ > CPU(s): 8 > MEM: 26065 MB Does the same happen on the bare metal? Also what are the numbers for the current vanilla kernel? -- Michal Hocko SUSE Labs