From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
        id S1762672AbdEWL7O (ORCPT <rfc822;w@1wt.eu>);
        Tue, 23 May 2017 07:59:14 -0400
Received: from Galois.linutronix.de ([146.0.238.70]:53471 "EHLO
        Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
        with ESMTP id S1759899AbdEWL7M (ORCPT
        <rfc822;linux-kernel@vger.kernel.org>);
        Tue, 23 May 2017 07:59:12 -0400
Date: Tue, 23 May 2017 13:58:57 +0200 (CEST)
From: Thomas Gleixner <tglx@linutronix.de>
To: David Laight <David.Laight@ACULAB.COM>
cc: Arnd Bergmann <arnd@arndb.de>, linux-s390 <linux-s390@vger.kernel.org>,
        Mark Gross <mark.gross@intel.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Tejun Heo <tj@kernel.org>,
        linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
        Christoph Hellwig <hch@lst.de>
Subject: RE: RFC: better timer interface
In-Reply-To: <063D6719AE5E284EB5DD2968C1650D6DCFFFD8B2@AcuExch.aculab.com>
Message-ID: <alpine.DEB.2.20.1705231358220.2740@nanos>
References: <20170516114812.10660-1-hch@lst.de> <CAK8P3a1FoR_usw7du3ZRMF+PPhJ712EpArL_e1bLVNs7BYBu-w@mail.gmail.com> <20170516155132.GA1494@lst.de> <CAK8P3a3_Rjz9gTmayN1w8HrFHWY+wakeFgQSYRTAADJzF6zKJA@mail.gmail.com> <alpine.DEB.2.20.1705211859410.3023@nanos>
 <alpine.DEB.2.20.1705211959370.3023@nanos> <063D6719AE5E284EB5DD2968C1650D6DCFFFD8B2@AcuExch.aculab.com>
User-Agent: Alpine 2.20 (DEB 67 2015-01-07)
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Tue, 23 May 2017, David Laight wrote:

> From: Thomas Gleixner
> > Sent: 21 May 2017 19:15
> ...
> > > timer_start(timer, ms, abs)
> > 
> > I'm not even sure, whether we need absolute timer wheel timers at
> > all, because most use cases are relative to now.
> 
> Posix requires absolute timers for some userspace calls
> (annoying because the code often wants relative).

Posix is completely irrelevant here. These timers are purely kernel
internal.

Thanks,

	tglx