From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966316AbcIYMk1 (ORCPT ); Sun, 25 Sep 2016 08:40:27 -0400 Received: from mail.virtall.com ([178.63.195.102]:38203 "EHLO mail.virtall.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966207AbcIYMkZ (ORCPT ); Sun, 25 Sep 2016 08:40:25 -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=HTjkyznj glfuQbSqv2E2/5FgVAYIreObZtLbHF7qfLFSgXaumwDEDURrM+Rgb5a+0/Nbl1w5 9LlSb4NqqJeCD9DE1OGJMSrzS+y3qvr+jnSfOSzdCTHAah+IVSllrveu9JpVnkgI 6PWKlBsBVDrJiKN6battvZGoPdLWbFbk6dc= MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Sun, 25 Sep 2016 21:40:20 +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: References: <35b2acf87bfeaf1d04f2cf3d10b99b6e@admin.virtall.com> <20acd5801291dff03ed56b63919b9249@admin.virtall.com> <1474639800.4025.29.camel@gmail.com> <50d06a3b797091821d190196b48e8d52@admin.virtall.com> Message-ID: 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 2016-09-25 18:29, Tomasz Chmielewski wrote: >> I'll try to bisect. > > OK, not a kernel regression, but some config change caused it. > However, I'm not able to locate which change exactly. > > I'm attaching two configs which I've tried with 4.7.3 - one results in > thousands of kworkers, and the other doesn't. Also included a diff > between them. > > Any obvious changes I should try? The problem is the allocator. -CONFIG_SLUB=y +CONFIG_SLAB=y With SLUB, I'm getting a handful of kworker processes, as expected. With SLAB, I'm getting thousands of kworker processes. Not sure if that's expected behaviour or not. Tomasz Chmielewski https://lxadm.com