From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S967029AbcIWQPr (ORCPT ); Fri, 23 Sep 2016 12:15:47 -0400 Received: from mail.virtall.com ([178.63.195.102]:48019 "EHLO mail.virtall.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965898AbcIWQPp (ORCPT ); Fri, 23 Sep 2016 12:15:45 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=wpkg.org; h=mime-version :content-type:content-transfer-encoding:date:from:to:cc:subject :in-reply-to:references:message-id; q=dns; s=default; b=hj6Czq9T xDIzsRFC7EzYT5vjJVr8S9Dw9Y2Xg91jkFyuggM0qVgLuVwgXJvRoDV88E+2BfCZ xfFVG/Vf8wzLRF/bPlt3FGNUwBP0r02DdYgQm1i4j4a1BSBKvM55qhVYZTJEcOPY KaEMnfQjhuM/hQxWPHRJ+bODmo5aJaG2zUc= MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Sat, 24 Sep 2016 01:15:40 +0900 From: Tomasz Chmielewski To: Mike Galbraith Cc: LKML Subject: Re: thousands of kworker processes with 4.7.x and 4.8-rc* In-Reply-To: <1474639800.4025.29.camel@gmail.com> References: <35b2acf87bfeaf1d04f2cf3d10b99b6e@admin.virtall.com> <20acd5801291dff03ed56b63919b9249@admin.virtall.com> <1474639800.4025.29.camel@gmail.com> Message-ID: <50d06a3b797091821d190196b48e8d52@admin.virtall.com> User-Agent: Roundcube Webmail/1.2.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2016-09-23 23:10, Mike Galbraith wrote: >> I did some experiments to see when the problem first appeared. >> Thousands >> of kworker processes start to show up in 4.7.0-rc5. >> >> kernel version | kworker count after boot >> ------------------------------------------- >> 4.6.3 > > 37 >> 4.6.4 > > 47 >> 4.6.5 > > 46 >> 4.6.6 > > 49 >> 4.6.7 > > 49 >> 4.7.0-rc1 > > 46 >> 4.7.0-rc2 > > 49 >> 4.7.0-rc3> > 45 >> 4.7.0-rc4> > 47 >> 4.7.0-rc5> > 1592 > > Best bet would be to use 'git bisect' to locate the exact commit that > caused this, and post the bisection result along with your config. > > AFAIK, nobody else is seeing this, is the kernel virgin source? Yes, it's a kernel.org kernel. I found some similar reports, though without much more info: https://github.com/zfsonlinux/zfs/issues/5036 - kernel 4.7.2, initially attributed to ZFS on Linux, but then reproduced without ZFS https://github.com/systemd/systemd/issues/4069 - kernel 4.7.2 I'll try to bisect. Tomasz Chmielewski https://lxadm.com