Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757559AbYBZF7n (ORCPT ); Tue, 26 Feb 2008 00:59:43 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751705AbYBZF7d (ORCPT ); Tue, 26 Feb 2008 00:59:33 -0500 Received: from ag-out-0708.google.com ([72.14.246.251]:54679 "EHLO ag-out-0708.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751644AbYBZF7c (ORCPT ); Tue, 26 Feb 2008 00:59:32 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=WI7QMFXDCvHFgU7d4bGmJrhxrmIu6t4+QCUJpARYGMyn3H4pJiq+djyx3p82hk2t/vJq9AdsIMfj+4Ek4U2vQnAOsC5A8rl3RYtb+C920UTCQrHftFuerOZXf4/fmLQPMGXpdOXKMLZ8NHHxMedREc0maWwIHzLWR+3bFpAT9rs= Message-ID: Date: Tue, 26 Feb 2008 13:59:31 +0800 From: "Dave Young" To: "Randy Dunlap" Subject: Re: boot_delay broken ? Cc: akpm , "Dave Jones" , "Linux Kernel" , "Thomas Gleixner" In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20080224004615.GA31012@codemonkey.org.uk> <20080225212251.18c4659e.randy.dunlap@oracle.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1973 Lines: 57 On Tue, Feb 26, 2008 at 1:48 PM, Dave Young wrote: > On Tue, Feb 26, 2008 at 1:22 PM, Randy Dunlap wrote: > > On Mon, 25 Feb 2008 10:14:36 +0800 Dave Young wrote: > > > > > On Sun, Feb 24, 2008 at 8:46 AM, Dave Jones wrote: > > > > The boot_delay switch seems to be behaving strangely in the > > > > current -git. Setting it to =10 makes the output 'bursty' > > > > it becomes slow for some printk's whilst others scroll by > > > > at regular speed. > > > > Setting it any higher than that seems to make it pause for > > > > a really long time before it outputs any text at all. > > > > > > On my side there's this issue for a long time > > > http://lkml.org/lkml/2007/8/8/79 > > > > [http://marc.info/?l=linux-kernel&m=118655896515049&w=2] > > > > You asked questions and they were answered. Perhaps you didn't like > > the answers. > > No, I like it. Thanks. > > But I still want to know why mdelay can not be used. > is it not available for all archs or something else? > > > > > > Here's a question for you. What kernel boot options did you use? > > Specifically, for lpj= and boot_delay= ? > > I tried boot_delay=100 and boot_delay=200 without lpj set, The result > was really slow. It was better with lpj copied from dmesg, but was > still slower then mdelay. Especially at the very beginning after the message "Booting the kernel", I need to wait several minutes to see the afterwards messages > > I think we can firstly use preset lpj, after delay calibrating just > use the system lpj > > > > > > > > > > > > > x86 timer changes perhaps ? > > > > > > --- > > ~Randy > > > -- 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/