From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Gregory Haskins" Subject: Re: [PATCH 2/3] sched: terminate newidle balancing once at least one task has moved over Date: Tue, 08 Jul 2008 06:37:37 -0600 Message-ID: <48732751.BA47.005A.0@novell.com> References: <20080627202444.3829.21595.stgit@lsg.lsg.lab.novell.com> <20080627202955.3829.78937.stgit@lsg.lsg.lab.novell.com> <200807081500.18245.nickpiggin@yahoo.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8BIT Cc: , , , , , To: "Nick Piggin" Return-path: Received: from sinclair.provo.novell.com ([137.65.248.137]:44206 "EHLO sinclair.provo.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758608AbYGHMon convert rfc822-to-8bit (ORCPT ); Tue, 8 Jul 2008 08:44:43 -0400 In-Reply-To: <200807081500.18245.nickpiggin@yahoo.com.au> Content-Disposition: inline Sender: linux-rt-users-owner@vger.kernel.org List-ID: >>> On Tue, Jul 8, 2008 at 1:00 AM, in message <200807081500.18245.nickpiggin@yahoo.com.au>, Nick Piggin wrote: > On Saturday 28 June 2008 06:29, Gregory Haskins wrote: >> Inspired by Peter Zijlstra. >> >> Signed-off-by: Gregory Haskins > > What happened to the feedback I sent about this? > > It is still nack from me. Ah yes. Slipped through the cracks...sorry about that. What if we did "if (idle == CPU_NEWLY_IDLE && need_resched())" instead? -Greg > > >> --- >> >> kernel/sched.c | 4 ++++ >> 1 files changed, 4 insertions(+), 0 deletions(-) >> >> diff --git a/kernel/sched.c b/kernel/sched.c >> index 56722b1..0b9f90e 100644 >> --- a/kernel/sched.c >> +++ b/kernel/sched.c >> @@ -2863,6 +2863,10 @@ static int move_tasks(struct rq *this_rq, int >> this_cpu, struct rq *busiest, max_load_move - total_load_moved, >> sd, idle, all_pinned, &this_best_prio); >> class = class->next; >> + >> + if (idle == CPU_NEWLY_IDLE && this_rq->nr_running) >> + break; >> + >> } while (class && max_load_move > total_load_moved); >> >> return total_load_moved > 0; >> >> --