Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754152AbbFJIPh (ORCPT ); Wed, 10 Jun 2015 04:15:37 -0400 Received: from mga03.intel.com ([134.134.136.65]:2987 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753844AbbFJIPb (ORCPT ); Wed, 10 Jun 2015 04:15:31 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.13,586,1427785200"; d="scan'208";a="724448070" Message-ID: <5577F193.70702@intel.com> Date: Wed, 10 Jun 2015 11:13:07 +0300 From: Adrian Hunter Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 MIME-Version: 1.0 To: George Spelvin CC: tglx@linutronix.de, ak@linux.intel.com, hpa@zytor.com, linux-kernel@vger.kernel.org, luto@amacapital.net, mingo@kernel.org, torvalds@linux-foundation.org Subject: Re: Discussion: quick_pit_calibrate is slow References: <20150610070842.4980.qmail@ns.horizon.com> In-Reply-To: <20150610070842.4980.qmail@ns.horizon.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 460 Lines: 11 On 10/06/15 10:08, George Spelvin wrote: > The 8254 timer latches the msbyte when the lsbyte is read > and returns the latched value on the next read Are you sure about? The docs I've read don't seem to say that. -- 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/