From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755405AbaIQPJn (ORCPT ); Wed, 17 Sep 2014 11:09:43 -0400 Received: from e35.co.us.ibm.com ([32.97.110.153]:59724 "EHLO e35.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754363AbaIQPJm (ORCPT ); Wed, 17 Sep 2014 11:09:42 -0400 Date: Wed, 17 Sep 2014 08:09:37 -0700 From: "Paul E. McKenney" To: Clark Williams Cc: LKML Subject: Re: [PATCH] rcu: unify boost and kthread priorities Message-ID: <20140917150937.GV4723@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <20140915100524.2cd80d2e@sluggy> <20140916204156.GP4723@linux.vnet.ibm.com> <20140917081442.60425e2d@sluggy> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140917081442.60425e2d@sluggy> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14091715-6688-0000-0000-000004E185AF Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Sep 17, 2014 at 08:14:42AM -0500, Clark Williams wrote: > On Tue, 16 Sep 2014 13:41:56 -0700 > "Paul E. McKenney" wrote: > > > On Mon, Sep 15, 2014 at 10:05:24AM -0500, Clark Williams wrote: > > > Paul, > > > > > > Here's the result of our conversation Friday, regarding the per-CPU and > > > boost priorities: > > > > > > Rename CONFIG_RCU_BOOST_PRIO to CONFIG_RCU_KTHREAD_PRIO and use this > > > value for both the per-CPU kthreads (rcuc/N) and the rcu boosting > > > threads (rcub/n). > > > > > > Also, create the module_parameter rcutree.kthread_prio to be used on > > > the kernel command line at boot to set a new value > > > (rcutree.kthread_prio=N). > > > > > > Signed-off-by: Clark Williams > > > > Thank you, Clark! > > > > I queued this, porting to rcu/dev, which resulted in the following > > patch. Please check this to make sure it still reflects your intent. > > In the meantime, I will start testing. > > > > Thanx, Paul > > Yes, looks right (and you fixed that I didn't have it all under > RCU_BOOST). Very good! Early testing looks good, will let you know how it goes. Thanx, Paul