Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 9 Jul 2002 02:57:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 9 Jul 2002 02:57:30 -0400 Received: from parcelfarce.linux.theplanet.co.uk ([195.92.249.252]:56844 "EHLO www.linux.org.uk") by vger.kernel.org with ESMTP id ; Tue, 9 Jul 2002 02:57:29 -0400 Message-ID: <3D2A8B81.42042058@zip.com.au> Date: Tue, 09 Jul 2002 00:06:41 -0700 From: Andrew Morton X-Mailer: Mozilla 4.79 [en] (X11; U; Linux 2.4.19-pre9 i686) X-Accept-Language: en MIME-Version: 1.0 To: Dave Hansen CC: Matthew Wilcox , linux-kernel@vger.kernel.org Subject: Re: readprofile from 2.5.25 web server benchmark References: <3D2A8152.7040200@us.ibm.com> <3D2A863D.DC0AF866@zip.com.au> <3D2A8779.9070104@us.ibm.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1000 Lines: 34 Dave Hansen wrote: > > ... > > I'd be interested in the effect of the latter. It's very 2.4-able. > > Do you mean 2.5-able? > http://www.google.com/search?hl=en&ie=UTF-8&oe=UTF-8&q=smptimers+2.5 > > I found a couple of 2.5.*teen patches, but they're miles away from > applying cleanly. Work for tomorrow, sigh... > Nah. I mean this technological gem: --- 2.5.25/kernel/timer.c~timer-speedup Tue Jul 9 00:04:33 2002 +++ 2.5.25-akpm/kernel/timer.c Tue Jul 9 00:06:09 2002 @@ -211,6 +211,9 @@ int mod_timer(struct timer_list *timer, int ret; unsigned long flags; + if (timer_pending(timer) && timer->expires == expires) + return 1; + spin_lock_irqsave(&timerlist_lock, flags); timer->expires = expires; ret = detach_timer(timer); - - 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/