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=-2.3 required=3.0 tests=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 5811DC1975A for ; Tue, 17 Mar 2020 20:18:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2FE302051A for ; Tue, 17 Mar 2020 20:18:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726735AbgCQUSs (ORCPT ); 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