From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755854AbZFYXkW (ORCPT ); Thu, 25 Jun 2009 19:40:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751999AbZFYXkM (ORCPT ); Thu, 25 Jun 2009 19:40:12 -0400 Received: from mail-px0-f190.google.com ([209.85.216.190]:39650 "EHLO mail-px0-f190.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751503AbZFYXkL (ORCPT ); Thu, 25 Jun 2009 19:40:11 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; b=mjtNlpDcs+hJzRl3eqE5osK6U1gwN29hKcn5aVAC3hcd9QkKYpVFZt/WhK8IsrZw0y YKhX//waK94a1HaO5aZTjnrCAEHSOFDNJtoeJCWsewePOGz1IRs/OLibLm9p0PQbjHcn jwoEjKl0Y4y/hB+uywgRdF21Ov7QzK0m50u28= Message-ID: <4A440B08.6050006@gmail.com> Date: Thu, 25 Jun 2009 17:40:56 -0600 From: Robert Hancock User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1b3pre) Gecko/20090513 Fedora/3.0-2.3.beta2.fc11 Thunderbird/3.0b2 MIME-Version: 1.0 To: kernel mailz CC: linux-kernel@vger.kernel.org Subject: Re: Slowing down the schedular, How? References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 06/25/2009 12:36 PM, kernel mailz wrote: > Hi, > > I have a SMP linux running on 85xx poweprc. Say on Core 0 and Core 1 > two different processes are running and on both the schedular runs. > Now for some special case, if one of my process issues a ioctl which > gets serviced by a kernel module, I wish to slow the schedular on that > core only. Otherwise the performance will get degraded. > > Should I use highest priority tasklet, will it be sufficient or i need > to do something special > > -TZ Not clear what you mean by "slowing the scheduler" or "performance will get degraded". The scheduler is not a process, it runs when something triggers it to run.