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_2 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 18D18C32751 for ; Wed, 7 Aug 2019 20:07:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EBB612199C for ; Wed, 7 Aug 2019 20:07:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389079AbfHGUH2 (ORCPT ); Wed, 7 Aug 2019 16:07:28 -0400 Received: from mail.kernel.org ([198.145.29.99]:47846 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388210AbfHGUH2 (ORCPT ); Wed, 7 Aug 2019 16:07:28 -0400 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2979521922; Wed, 7 Aug 2019 20:07:27 +0000 (UTC) Date: Wed, 7 Aug 2019 16:07:25 -0400 From: Steven Rostedt To: Juri Lelli Cc: linux-rt-users , LKML , Thomas Gleixner , Sebastian Andrzej Siewior , Daniel Bristot de Oliveira , Clark Williams Subject: Re: [RT BUG] isolcpus causes sleeping function called from invalid context (4.19.59-rt24) Message-ID: <20190807160725.10a554e7@gandalf.local.home> In-Reply-To: <20190805100646.GH14724@localhost.localdomain> References: <20190805100646.GH14724@localhost.localdomain> X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-rt-users-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rt-users@vger.kernel.org On Mon, 5 Aug 2019 12:06:46 +0200 Juri Lelli wrote: > This only happens if isolcpus are configured at boot. > > AFAIU, RT is reworking workqueues and 5.x-rt shouldn't suffer from this. > As a matter of fact, I could verify that backporting the workqueue > rework all-in change from 5.0-rt [1] fixes this problem. So you have backported this and it fixed the bug? > > I'm thus wondering if there is any plan on backporting the rework to > 4.19-rt stable, and if that patch has dependencies, or if any alternative > fix might be found for this problem. I could do it after I fix the bug with 4.19.63 merge :-/ (which may be related. Who knows). -- Steve