Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933585AbWKWLBW (ORCPT ); Thu, 23 Nov 2006 06:01:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933590AbWKWLBW (ORCPT ); Thu, 23 Nov 2006 06:01:22 -0500 Received: from gate.crashing.org ([63.228.1.57]:16824 "EHLO gate.crashing.org") by vger.kernel.org with ESMTP id S933585AbWKWLBV (ORCPT ); Thu, 23 Nov 2006 06:01:21 -0500 Subject: Re: NTP time sync From: Benjamin Herrenschmidt To: Andi Kleen Cc: Alessandro Zummo , Linux Kernel Mailing List , David Brownell , linuxppc-dev@ozlabs.org, Kumar Gala , Kim Phillips , akpm@osdl.org, davem@davemloft.net, kkojima@rr.iij4u.or.jp, lethal@linux-sh.org, paulus@samba.org, ralf@linux-mips.org, rmk@arm.linux.org.uk In-Reply-To: <20061123105400.GA75714@muc.de> References: <20061122203633.611acaa8@inspiron> <20061123105400.GA75714@muc.de> Content-Type: text/plain Date: Thu, 23 Nov 2006 22:00:05 +1100 Message-Id: <1164279605.5653.51.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.8.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 804 Lines: 21 On Thu, 2006-11-23 at 11:54 +0100, Andi Kleen wrote: > > [1] http://lkml.org/lkml/2006/3/28/358 > > What was the answer to Matt's last question in there? > If the existing user land does it already then > probably. If not then a good migration strategy would > be needed. Couldn't we have a transition period by making the kernel not rely on interrupts ? if the NTP irq code just triggers a work queue, then all of a sudden, all of the RTC drivers can be used and the latency is small. That might well be a good enough solution and is very simple. Ben - 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/