From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754975AbZGNPXu (ORCPT ); Tue, 14 Jul 2009 11:23:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754831AbZGNPXt (ORCPT ); Tue, 14 Jul 2009 11:23:49 -0400 Received: from mail-fx0-f218.google.com ([209.85.220.218]:51647 "EHLO mail-fx0-f218.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751267AbZGNPXt convert rfc822-to-8bit (ORCPT ); Tue, 14 Jul 2009 11:23:49 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=bvinQiJbDaUuH3S1BHxh5yNiA0AlzmijCAXeJdtkwD/SYbLAFbGzKvEdBw3EvkOhtY bn8R0uO/8s4+PjIXjCak9xqRNVf7asg4mKar/bQPzaScdIAb0BDYGbniJAQq5lllZo5h DIkui33MUPQcrcf4GRxIFnK7hA0XqbdJeFq1I= MIME-Version: 1.0 In-Reply-To: <48F90369174947C98F6AE82888FA60C5@realtek.com.tw> References: <48F90369174947C98F6AE82888FA60C5@realtek.com.tw> Date: Tue, 14 Jul 2009 17:23:47 +0200 Message-ID: <63386a3d0907140823s62140f85t7947a8ebe02382e9@mail.gmail.com> Subject: Re: jiffies got lost because of printk From: Linus Walleij To: =?Big5?B?qkyr2KZ3?= Cc: linux-kernel@vger.kernel.org Content-Type: text/plain; charset=Big5 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2009/7/14 ªL«Ø¦w : > We found that system time is not synced with RTC time on our embedded > system. (...) > interrupt will be disabled for more than 1 HZ and timer interrupt will be > lost. This sounds like you're using some kind of old timekeeping code. Make sure you migrate to using a proper time source and clock events. It will compensate for lost jiffies in situations like this. Linus Walleij