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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,UNPARSEABLE_RELAY 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 88EADC43441 for ; Fri, 9 Nov 2018 22:02:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 25A54208A3 for ; Fri, 9 Nov 2018 22:02:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 25A54208A3 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.alibaba.com 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 S1728681AbeKJHoc (ORCPT ); Sat, 10 Nov 2018 02:44:32 -0500 Received: from out30-132.freemail.mail.aliyun.com ([115.124.30.132]:54788 "EHLO out30-132.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726181AbeKJHob (ORCPT ); Sat, 10 Nov 2018 02:44:31 -0500 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R761e4;CH=green;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01f04389;MF=yang.shi@linux.alibaba.com;NM=1;PH=DS;RN=7;SR=0;TI=SMTPD_---0TCdOrkR_1541800906; Received: from US-143344MP.local(mailfrom:yang.shi@linux.alibaba.com fp:SMTPD_---0TCdOrkR_1541800906) by smtp.aliyun-inc.com(127.0.0.1); Sat, 10 Nov 2018 06:01:49 +0800 Subject: Re: ODEBUG: Out of memory. ODEBUG disabled To: Qian Cai Cc: open list , Thomas Gleixner , Waiman Long , Arnd Bergmann , "Joel Fernandes (Google)" , Zhong Jiang References: <54B1AA39-2C58-4B0C-B8A8-9F85EBA7C963@gmx.us> <5c3b1cf4-1d83-c0a5-4243-28fde66b5cd9@linux.alibaba.com> <9762E093-FCDD-4DAA-8FCE-9D6B953B6F17@gmx.us> From: Yang Shi Message-ID: <0181049f-55bd-b0ad-afe3-302272b69c73@linux.alibaba.com> Date: Fri, 9 Nov 2018 14:01:44 -0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <9762E093-FCDD-4DAA-8FCE-9D6B953B6F17@gmx.us> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/9/18 1:51 PM, Qian Cai wrote: > >> On Nov 9, 2018, at 4:42 PM, Yang Shi wrote: >> >> >> >> On 11/9/18 1:36 PM, Qian Cai wrote: >>> It is a bit annoying on this aarch64 server with 64 CPUs that is >>> booting the latest mainline (3541833fd1f2) causes object debugging >>> always running out of memory. >> May you please paste the detail failure log? > I assume you mean dmesg. > > Here is the dmesg for 64 CPUs, > https://paste.ubuntu.com/p/BnhvXXhn7k/ I don't see the oom message, it looks it boots up successfully with 64 CPUs. >>> I have to boot the kernel with only 16 CPUs instead (nr_cpus=16) >>> to make it work. Is it expected that object debugging is not going >>> to work with large machines? >> I don't think so. I'm supposed it works well with large CPU number on x86. > Here is the one with nr_cpus workaround, > https://paste.ubuntu.com/p/qMpd2CCPSV/