Received: by 2002:a25:e7d8:0:0:0:0:0 with SMTP id e207csp4157236ybh; Tue, 17 Mar 2020 13:21:24 -0700 (PDT) X-Google-Smtp-Source: ADFU+vsFTXayZf573v4igJ08HrIWRAskMZJIy5WRz1Y1E87AemnUxntuiSZT3UMkDCEv0IuFPfEn X-Received: by 2002:a9d:7843:: with SMTP id c3mr876708otm.89.1584476483947; Tue, 17 Mar 2020 13:21:23 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1584476483; cv=none; d=google.com; s=arc-20160816; b=lYZftOMdrbgQGw/q2il4EJMw34H/r6UyzUTMxLCeLlXyBuGaXwVUWBAUw8X0ZJNbwb +rgRuI2daeuII76Su0bqxLw+VpI92otQA2+KV3VKl6zx/HKJy7r5Vs4lNuFWT24cXdQj JV2bCduJWD+f9VxyqI6dUiBrsHHvos5WaMSeChA3BCEeHsfPRGeHNudewTuvsC8+q8GX mVV43Ct69Trwyrd07mn3M6+4NGrRSbQwHh5JMEREQLyOSp0ParHnimjMas6BrZAWb1K4 urI4RX8iYudrRU9uVVWPmo0QdRjvcf0TtzUFz9Xo5J0sNcGEMdkVepkYclEk1tpQf+dt fHaw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding :content-language:in-reply-to:mime-version:user-agent:date :message-id:references:cc:to:from:subject:ironport-sdr:ironport-sdr; bh=rkR1icJQzj2qu+H+s1bFMwGDSSkFwOd8zWF7Fr3mK+0=; b=QalPeGB8Jyie7jrZz2wct5ucfM2QVaFdr0upyjMuma7BdjBo1TwyTppweJnEOwefQ2 90IcFDbCcEKpItZAP1CBVT1d2q2CcouD8ALDaRKZDwhng7EtweG635EU/8Zk4b1UsmSU i5pXwa9tn/ASU4VGKiT7ymKGQ/1/0CMjar1q8PqpRUbTUoev6luwVHTnW+5ZI6p5kFUb IH+zHX0QpHDv29vfU5qo39WIS037p+34c+Q+5OTcjkj9cIFiS1QklVJLjmT9Xm7X3Lc0 27YUQjQctuh7pdcIivUVIbEjnoNomwrWBYZUZGMZ5OlcXsJp8ogOWBppIfxjrb0873eY F+wQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id e4si2337488otj.242.2020.03.17.13.19.59; Tue, 17 Mar 2020 13:21:23 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726682AbgCQUSs (ORCPT + 99 others); Tue, 17 Mar 2020 16:18:48 -0400 Received: from mga05.intel.com ([192.55.52.43]:37572 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726476AbgCQUSs (ORCPT ); Tue, 17 Mar 2020 16:18:48 -0400 IronPort-SDR: HuXQ0suMk8C5SSyebRHo0e8w8/BG454BVgFUvEzIDAL462n2/4qc46H0BLcaiy567Z5PNFaui+ o9Yw9tTBrnKQ== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Mar 2020 13:18:47 -0700 IronPort-SDR: eVT43dyUHqN7iFTsZ9YK8rjvDSABTdR4IS6P5rhjn2TfDdvF5rNdcXK8SRitRHye28FZJTsaoF VjppxR7WrGEQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,565,1574150400"; d="scan'208";a="355474703" Received: from schen9-mobl.amr.corp.intel.com ([10.134.81.123]) by fmsmga001.fm.intel.com with ESMTP; 17 Mar 2020 13:18:45 -0700 Subject: Re: [RFC PATCH v4 00/19] Core scheduling v4 From: Tim Chen To: Joel Fernandes , Julien Desfossez , Peter Zijlstra Cc: Vineeth Remanan Pillai , Aubrey Li , Nishanth Aravamudan , Ingo Molnar , Thomas Gleixner , Paul Turner , Linus Torvalds , Linux List Kernel Mailing , Dario Faggioli , =?UTF-8?B?RnLDqWTDqXJpYyBXZWlzYmVja2Vy?= , Kees Cook , Greg Kerr , Phil Auld , Aaron Lu , Valentin Schneider , Mel Gorman , Pawan Gupta , Paolo Bonzini , "Luck, Tony" References: <3c3c56c1-b8dc-652c-535e-74f6dcf45560@linux.intel.com> <20200212230705.GA25315@sinkpad> <29d43466-1e18-6b42-d4d0-20ccde20ff07@linux.intel.com> <20200221232057.GA19671@sinkpad> <20200317005521.GA8244@google.com> Message-ID: <1075ba53-91ed-2138-89b3-60fbfbd80b57@linux.intel.com> Date: Tue, 17 Mar 2020 13:18:45 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org BTW Joel, Did you guys have a chance to try out v5 core scheduler? > - Joel(ChromeOS) found a deadlock and crash on PREEMPT kernel in the > coreshed idle balance logic We did some patches to fix a few stability issues in v4. I wonder if v5 still has the deadlock that you saw before? Tim