From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759340Ab0ECNhM (ORCPT ); Mon, 3 May 2010 09:37:12 -0400 Received: from vms173001pub.verizon.net ([206.46.173.1]:56878 "EHLO vms173001pub.verizon.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755525Ab0ECNhK (ORCPT ); Mon, 3 May 2010 09:37:10 -0400 Date: Mon, 03 May 2010 08:36:59 -0500 From: Corey Minyard To: Linux Kernel , Andrew Morton Cc: OpenIPMI Developers , Matthew Garrett Subject: [PATCH 6/8] ipmi: Reduce polling Message-id: <20100503133659.GF8130@minyard.local> Reply-to: minyard@acm.org MIME-version: 1.0 Content-type: text/plain; charset=us-ascii Content-disposition: inline User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Matthew Garrett We can reasonably alter the poll rate depending on whether we're performing a transaction or merely waiting for an event. Signed-off-by: Matthew Garrett Signed-off-by: Corey Minyard --- Index: linux-2.6/drivers/char/ipmi/ipmi_si_intf.c =================================================================== --- linux-2.6.orig/drivers/char/ipmi/ipmi_si_intf.c +++ linux-2.6/drivers/char/ipmi/ipmi_si_intf.c @@ -893,6 +893,9 @@ static void sender(void * mod_timer(&smi_info->si_timer, jiffies + SI_TIMEOUT_JIFFIES); + if (smi_info->thread) + wake_up_process(smi_info->thread); + if (smi_info->run_to_completion) { /* * If we are running to completion, then throw it in @@ -1013,6 +1016,8 @@ static int ipmi_thread(void *data) ; /* do nothing */ else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait) schedule(); + else if (smi_result == SI_SM_IDLE) + schedule_timeout_interruptible(100); else schedule_timeout_interruptible(0); } @@ -1055,6 +1060,7 @@ static void smi_timeout(unsigned long da unsigned long flags; unsigned long jiffies_now; long time_diff; + long timeout; #ifdef DEBUG_TIMING struct timeval t; #endif @@ -1075,9 +1081,9 @@ static void smi_timeout(unsigned long da if ((smi_info->irq) && (!smi_info->interrupt_disabled)) { /* Running with interrupts, only do long timeouts. */ - smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; + timeout = jiffies + SI_TIMEOUT_JIFFIES; smi_inc_stat(smi_info, long_timeouts); - goto do_add_timer; + goto do_mod_timer; } /* @@ -1086,15 +1092,15 @@ static void smi_timeout(unsigned long da */ if (smi_result == SI_SM_CALL_WITH_DELAY) { smi_inc_stat(smi_info, short_timeouts); - smi_info->si_timer.expires = jiffies + 1; + timeout = jiffies + 1; } else { smi_inc_stat(smi_info, long_timeouts); - smi_info->si_timer.expires = jiffies + SI_TIMEOUT_JIFFIES; + timeout = jiffies + SI_TIMEOUT_JIFFIES; } - do_add_timer: - if ((smi_result != SI_SM_IDLE) || smi_info->interrupt_disabled) - add_timer(&(smi_info->si_timer)); + do_mod_timer: + if (smi_result != SI_SM_IDLE) + mod_timer(&(smi_info->si_timer), timeout); } static irqreturn_t si_irq_handler(int irq, void *data)