From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261355AbULNAQS (ORCPT ); Mon, 13 Dec 2004 19:16:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261356AbULNAQS (ORCPT ); Mon, 13 Dec 2004 19:16:18 -0500 Received: from tomts22.bellnexxia.net ([209.226.175.184]:21213 "EHLO tomts22-srv.bellnexxia.net") by vger.kernel.org with ESMTP id S261355AbULNAQK (ORCPT ); Mon, 13 Dec 2004 19:16:10 -0500 Subject: Re: dynamic-hz From: Eric St-Laurent To: Alan Cox Cc: Russell King , Stefan Seyfried , Con Kolivas , Pavel Machek , Linux Kernel Mailing List , Andrea Arcangeli In-Reply-To: <1102949565.2687.2.camel@localhost.localdomain> References: <20041211142317.GF16322@dualathlon.random> <20041212163547.GB6286@elf.ucw.cz> <20041212222312.GN16322@dualathlon.random> <41BCD5F3.80401@kolivas.org> <41BD483B.1000704@suse.de> <20041213135820.A24748@flint.arm.linux.org.uk> <1102949565.2687.2.camel@localhost.localdomain> Content-Type: text/plain Date: Mon, 13 Dec 2004 19:16:17 -0500 Message-Id: <1102983378.9865.11.camel@orbiter> Mime-Version: 1.0 X-Mailer: Evolution 2.0.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2004-12-13 at 14:52 +0000, Alan Cox wrote: > On a PC it makes huge sense, the deeply embedded folks who do turn the > thing off for 30secs at a time (Eg cellphone) also want it as do > virtualisation people where it trashes your scaling. API wise it isn't > too hard, its just a matter of time to convert the jiffies users away > and to do relative versions of add_timer with accuracy info included. Alan, On a related subject, a few months ago you posted a patch which added a nice add_timeout()/timeout_pending() API and converted many (if not most) drivers to use it. If I remember correctly it did not generate much comments and the work was not pushed into mainline. I think it's a nice cleanup, IMHO the time_(before|after)(jiffies, ...) construct is horrible. Any chance to resurrect this work ? PS: the original subject was "Initial bits to help pull jiffies out of drivers" Best regards, Eric St-Laurent