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=-5.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 364CFC433DF for ; Tue, 13 Oct 2020 05:08:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D2C352080A for ; Tue, 13 Oct 2020 05:08:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="He4ydt+u" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732220AbgJMFIi (ORCPT ); Tue, 13 Oct 2020 01:08:38 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:49057 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726400AbgJMFIi (ORCPT ); Tue, 13 Oct 2020 01:08:38 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1602565717; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=myC4QxIeMZFXjeNW7a1PS/FU6ygKZ5J7YIO3+g4d9lI=; b=He4ydt+ueBKT5aS7PbpSbn2ITu0eStyyjY1jJehYk4bDVNZhYOALPlOphRep9bjhpJfVrp sWYtDijONvHmZ0oi8AAS68F0+DuHw+pphMw+iDQ0NJr1zIpJ9qvX0A2HU0gzpwPyIfL8LR Q2xAq0x7XIrm7VCBwDm02ozaDg4Pnq8= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-184-jkNFnSL9PtGQEj9eqqFalg-1; Tue, 13 Oct 2020 01:08:30 -0400 X-MC-Unique: jkNFnSL9PtGQEj9eqqFalg-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 2777F64092; Tue, 13 Oct 2020 05:08:28 +0000 (UTC) Received: from localhost (ovpn-12-47.pek2.redhat.com [10.72.12.47]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 3DF3E76649; Tue, 13 Oct 2020 05:08:26 +0000 (UTC) Date: Tue, 13 Oct 2020 13:08:24 +0800 From: "bhe@redhat.com" To: Rahul Gopakumar Cc: "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , "akpm@linux-foundation.org" , "natechancellor@gmail.com" , "ndesaulniers@google.com" , "clang-built-linux@googlegroups.com" , "rostedt@goodmis.org" , Rajender M , Yiu Cho Lau , Peter Jonasson , Venkatesh Rajaram Subject: Re: Performance regressions in "boot_time" tests in Linux 5.8 Kernel Message-ID: <20201013050824.GK25604@MiWiFi-R3L-srv> References: <20201010061124.GE25604@MiWiFi-R3L-srv> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/12/20 at 05:21pm, Rahul Gopakumar wrote: > Hi Baoquan, > > Attached collected dmesg logs for with and without > commit after adding memblock=debug to kernel cmdline. Thanks, I have got the root cause, will make a patch for your testing soon.