netdev - Re: [RFC NET_SCHED 00/03]: ktime + nano-second clock resolution for packet schedulers

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Date:	Sun, 04 Mar 2007 16:25:57 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	kaber@...sh.net
Cc:	netdev@...r.kernel.org, shemminger@...ux-foundation.org
Subject: Re: [RFC NET_SCHED 00/03]: ktime + nano-second clock resolution
 for packet schedulers

From: Patrick McHardy <kaber@...sh.net>
Date: Sun,  4 Mar 2007 20:05:30 +0100 (MET)

> These patches convert the GETTIMEOFDAY packet scheduler clock source to
> ktime (based on Stephen's patch) and add support for using nano-second
> clock resolution. I chose a scalar time representation within the packet
> schedulers instead of ktime_t since it minimizes the ktime_to_ns() calls
> in most cases, it allows to clean up pkt_sched.h quite a bit and HFSC
> needs it anyway.
> 
> Unlike my previous attempt at this, these patches keep old iproute
> versions working with nano-second resolution with the exception of HFSC.
> I'm not sure what to do about HFSC yet, so just RFC for now.

This looks great to me.

Frankly, I think now that we have ktime and all of the proper generic
infrastructure to do this stuff properly, I think we should just use
ktime for the packet scheduler across the board and just delete all of
that old by-hand timekeeping selection crap from pkt_sched.h
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