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=-3.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 82767C4742C for ; Mon, 16 Nov 2020 11:51:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 09EB12224B for ; Mon, 16 Nov 2020 11:51:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=natalenko.name header.i=@natalenko.name header.b="iEJ6si+0" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729157AbgKPKcC (ORCPT ); Mon, 16 Nov 2020 05:32:02 -0500 Received: from vulcan.natalenko.name ([104.207.131.136]:43364 "EHLO vulcan.natalenko.name" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728511AbgKPKcC (ORCPT ); Mon, 16 Nov 2020 05:32:02 -0500 X-Greylist: delayed 43142 seconds by postgrey-1.27 at vger.kernel.org; Mon, 16 Nov 2020 05:31:56 EST Received: from mail.natalenko.name (vulcan.natalenko.name [IPv6:fe80::5400:ff:fe0c:dfa0]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by vulcan.natalenko.name (Postfix) with ESMTPSA id 9157F89DC2F; Mon, 16 Nov 2020 11:31:53 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=natalenko.name; s=dkim-20170712; t=1605522713; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=RW9+DZxPbG7BPXx8z5i8KVwGDSEimGw3DWXVhERnpPQ=; b=iEJ6si+0pRehtmcVyRKN+0L/8E99U+vHsJAkGJP/9UShessO1gWdT6JHwjWJnUT65PloUV PJ4IPqoxhcF+30tVqH0zWqmUu8HB2My+ANxoYawMwy7LuXtNaoCozApr8hgnWUDx9xRetz KOaUSms5gZ3DzQ58+kJaCf1M+yghJWA= MIME-Version: 1.0 Date: Mon, 16 Nov 2020 11:31:53 +0100 From: Oleksandr Natalenko To: Valentin Schneider Cc: linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org Subject: Re: WARNING at kernel/sched/core.c:2013 migration_cpu_stop+0x2e3/0x330 In-Reply-To: <41d6aca71c6a52df8437cdb7b4a1b1c4@natalenko.name> References: <41d6aca71c6a52df8437cdb7b4a1b1c4@natalenko.name> User-Agent: Roundcube Webmail/1.4.9 Message-ID: <9fca17b11bdf298d43bd4789f61f90ef@natalenko.name> X-Sender: oleksandr@natalenko.name Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-rt-users@vger.kernel.org On 16.11.2020 11:27, Oleksandr Natalenko wrote: > Not sure whether the check is legitimate, but FWIW I've managed to put > a test task [1] (it spawns a lot of threads and applies affinity) into > a permanent unkillable D state here: Just to make it clear: I neither applied your patch nor saw a splat this time, just a D state only. -- Oleksandr Natalenko (post-factum)