Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753443AbbFDSHy (ORCPT ); Thu, 4 Jun 2015 14:07:54 -0400 Received: from mail-ig0-f179.google.com ([209.85.213.179]:38189 "EHLO mail-ig0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752508AbbFDSHx (ORCPT ); Thu, 4 Jun 2015 14:07:53 -0400 MIME-Version: 1.0 In-Reply-To: <20150604175438.12888.qmail@ns.horizon.com> References: <20150604175438.12888.qmail@ns.horizon.com> Date: Thu, 4 Jun 2015 11:07:52 -0700 X-Google-Sender-Auth: 7956Empr9-SwZoLuu0SGPoEK1Zg Message-ID: Subject: Re: [PATCH RFC] x86, tsc: Allow for high latency in quick_pit_calibrate() From: Linus Torvalds To: George Spelvin Cc: Adrian Hunter , Andi Kleen , Peter Anvin , Linux Kernel Mailing List , Andy Lutomirski , Ingo Molnar , Thomas Gleixner Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 590 Lines: 14 On Thu, Jun 4, 2015 at 10:54 AM, George Spelvin wrote: > > Actually, the current code uses three timestamps: one before the last > read of the unwanted value, one in the middle, and one after the > read of the target value (bit set in this case). Yes, right you are. All are valid and interesting. Linus -- 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/