Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755927Ab0FNJpE (ORCPT ); Mon, 14 Jun 2010 05:45:04 -0400 Received: from hera.kernel.org ([140.211.167.34]:39911 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753295Ab0FNJpA (ORCPT ); Mon, 14 Jun 2010 05:45:00 -0400 Message-ID: <4C15F9D0.40706@kernel.org> Date: Mon, 14 Jun 2010 11:43:44 +0200 From: Tejun Heo User-Agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv:1.9.1.9) Gecko/20100317 Thunderbird/3.0.4 MIME-Version: 1.0 To: Jiri Slaby CC: mingo@elte.hu, tglx@linutronix.de, bphilips@suse.de, yinghai@kernel.org, akpm@linux-foundation.org, torvalds@linux-foundation.org, linux-kernel@vger.kernel.org, jeff@garzik.org, linux-ide@vger.kernel.org, stern@rowland.harvard.edu, gregkh@suse.de, khali@linux-fr.org Subject: Re: [PATCH 09/12] irq: implement IRQ expecting References: <1276443098-20653-1-git-send-email-tj@kernel.org> <1276443098-20653-10-git-send-email-tj@kernel.org> <4C15F4B7.5040601@gmail.com> In-Reply-To: <4C15F4B7.5040601@gmail.com> X-Enigmail-Version: 1.0.1 Content-Type: text/plain; charset=ISO-8859-2 Content-Transfer-Encoding: 7bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.3 (hera.kernel.org [127.0.0.1]); Mon, 14 Jun 2010 09:43:46 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1011 Lines: 30 Hello, On 06/14/2010 11:21 AM, Jiri Slaby wrote: > On 06/13/2010 05:31 PM, Tejun Heo wrote: >> --- a/kernel/irq/spurious.c >> +++ b/kernel/irq/spurious.c > ... > >> @@ -25,9 +26,43 @@ enum { >> /* IRQ polling common parameters */ >> IRQ_POLL_SLOW_INTV = 3 * HZ, /* not too slow for ppl, slow enough for machine */ >> IRQ_POLL_INTV = HZ / 100, /* from the good ol' 100HZ tick */ >> + IRQ_POLL_QUICK_INTV = HZ / 1000, /* pretty quick but not too taxing */ >> >> IRQ_POLL_SLOW_SLACK = HZ, >> IRQ_POLL_SLACK = HZ / 1000, /* 10% slack */ >> + IRQ_POLL_QUICK_SLACK = HZ / 10000, /* 10% slack */ > > Hi. These are zeros on most systems (assuming distros set HZ=100 and > 250), what is their purpose then? On every tick and no slack. :-) -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/