Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751863AbdIKNLe (ORCPT ); Mon, 11 Sep 2017 09:11:34 -0400 Received: from mail-qt0-f176.google.com ([209.85.216.176]:38217 "EHLO mail-qt0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751029AbdIKNLd (ORCPT ); Mon, 11 Sep 2017 09:11:33 -0400 X-Google-Smtp-Source: AOwi7QC3dQOFaay0YKm1T2DhuejV6vggnJ6O60gUJDVoajZYCwgQXETMFkC/djgXx2K6KDUuclfeFA== Date: Mon, 11 Sep 2017 06:11:29 -0700 From: Tejun Heo To: Markus Trippelsdorf Cc: Peter Zijlstra , linux-kernel@vger.kernel.org Subject: Re: Worker threads in D state since c5a94a618e7ac86 (workqueue: Use TASK_IDLE) Message-ID: <20170911131128.GD1774378@devbig577.frc2.facebook.com> References: <20170910073653.GA284@x4> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170910073653.GA284@x4> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 679 Lines: 26 Hello, On Sun, Sep 10, 2017 at 09:36:53AM +0200, Markus Trippelsdorf wrote: > Since: > > commit c5a94a618e7ac86b20f53d947f68d7cee6a4c6bc > Author: Peter Zijlstra > Date: Wed Aug 23 13:58:44 2017 +0200 > > workqueue: Use TASK_IDLE > > > all worker threads are in D state. They all show up when using "magic > SysRq w". In htop they all have big fat red 'D' in the state column. > Is this really desirable? > > I have attached the output of "ps aux" after boot and the SysRq-w > output. Hmm.... looks like we better revert until we figure out how this should get presented in debugging facilities / to userspace. Peter? Thanks. -- tejun