From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yw1-f70.google.com (mail-yw1-f70.google.com [209.85.161.70]) by kanga.kvack.org (Postfix) with ESMTP id E004B6B02A5 for ; Mon, 5 Nov 2018 21:25:06 -0500 (EST) Received: by mail-yw1-f70.google.com with SMTP id 123-v6so9149015ywt.12 for ; Mon, 05 Nov 2018 18:25:06 -0800 (PST) Received: from userp2120.oracle.com (userp2120.oracle.com. [156.151.31.85]) by mx.google.com with ESMTPS id w11-v6si28054823ywi.401.2018.11.05.18.25.05 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 05 Nov 2018 18:25:06 -0800 (PST) Date: Mon, 5 Nov 2018 18:24:51 -0800 From: Daniel Jordan Subject: Re: [RFC PATCH v4 02/13] ktask: multithread CPU-intensive kernel work Message-ID: <20181106022451.jry6nty6zsnpwq5e@ca-dmjordan1.us.oracle.com> References: <20181105165558.11698-1-daniel.m.jordan@oracle.com> <20181105165558.11698-3-daniel.m.jordan@oracle.com> <736b23a4-cb32-7926-101a-9b6555e59b5e@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <736b23a4-cb32-7926-101a-9b6555e59b5e@infradead.org> Sender: owner-linux-mm@kvack.org List-ID: To: Randy Dunlap Cc: Daniel Jordan , linux-mm@kvack.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, aarcange@redhat.com, aaron.lu@intel.com, akpm@linux-foundation.org, alex.williamson@redhat.com, bsd@redhat.com, darrick.wong@oracle.com, dave.hansen@linux.intel.com, jgg@mellanox.com, jwadams@google.com, jiangshanlai@gmail.com, mhocko@kernel.org, mike.kravetz@oracle.com, Pavel.Tatashin@microsoft.com, prasad.singamsetty@oracle.com, steven.sistare@oracle.com, tim.c.chen@intel.com, tj@kernel.org, vbabka@suse.cz On Mon, Nov 05, 2018 at 12:51:33PM -0800, Randy Dunlap wrote: > On 11/5/18 8:55 AM, Daniel Jordan wrote: > > diff --git a/init/Kconfig b/init/Kconfig > > index 41583f468cb4..ed82f76ed0b7 100644 > > --- a/init/Kconfig > > +++ b/init/Kconfig > > @@ -346,6 +346,17 @@ config AUDIT_TREE > > depends on AUDITSYSCALL > > select FSNOTIFY > > > > +config KTASK > > + bool "Multithread CPU-intensive kernel work" > > + depends on SMP > > + default y > > + help > > + Parallelize CPU-intensive kernel work. This feature is designed for > > + big machines that can take advantage of their extra CPUs to speed up > > + large kernel tasks. When enabled, kworker threads may occupy more > > + CPU time during these kernel tasks, but these threads are throttled > > + when other tasks on the system need CPU time. > > Use tab + 2 spaces consistently for help text indentation, please. Ok, will do. Thanks for pointing it out.