Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752547AbXHHLw3 (ORCPT ); Wed, 8 Aug 2007 07:52:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752491AbXHHLwW (ORCPT ); Wed, 8 Aug 2007 07:52:22 -0400 Received: from one.firstfloor.org ([213.235.205.2]:59087 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751935AbXHHLwV (ORCPT ); Wed, 8 Aug 2007 07:52:21 -0400 Date: Wed, 8 Aug 2007 13:52:19 +0200 From: Andi Kleen To: Manu Abraham Cc: Andi Kleen , Andrew Morton , Jonathan Corbet , linux-kernel@vger.kernel.org, Thomas Gleixner , Ingo Molnar , Roman Zippel Subject: Re: [PATCH] msleep() with hrtimers Message-ID: <20070808115219.GA13878@one.firstfloor.org> References: <15327.1186166232@lwn.net> <20070807124009.9f6c2247.akpm@linux-foundation.org> <1a297b360708080409tfc9dee5mb92c216919bffc1e@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1a297b360708080409tfc9dee5mb92c216919bffc1e@mail.gmail.com> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1003 Lines: 24 On Wed, Aug 08, 2007 at 03:09:14PM +0400, Manu Abraham wrote: > On 08 Aug 2007 13:55:28 +0200, Andi Kleen wrote: > > Andrew Morton writes: > > > > > > I'd be surprised if there was significant overhead - the maximum frequency > > > at which msleep() can be called is 1000Hz. We'd need an awful lot of > > > overhead for that to cause problems, surely? > > > > The bigger risk is probably to break drivers that rely on msleep(1) > > really being msleep( very long depending on HZ ) > > > > But the only way to find out is to try it. > > Well, i am quite sure a lot of drivers will be broken. But well .. if If you know of specific examples you should list them so that they can be fixed proactively. -Andi - 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/