linux-kernel - Re: [take12 0/3] kevent: Generic event handling mechanism.

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Message-ID: <20060823100303.GA1144@2ka.mipt.ru>
Date:	Wed, 23 Aug 2006 14:03:03 +0400
From:	Evgeniy Polyakov <johnpol@....mipt.ru>
To:	Andi Kleen <ak@...e.de>
Cc:	Jari Sundell <sundell.software@...il.com>,
	David Miller <davem@...emloft.net>, kuznet@....inr.ac.ru,
	nmiell@...cast.net, linux-kernel@...r.kernel.org,
	drepper@...hat.com, netdev@...r.kernel.org, zach.brown@...cle.com,
	hch@...radead.org
Subject: Re: [take12 0/3] kevent: Generic event handling mechanism.

On Wed, Aug 23, 2006 at 11:58:20AM +0200, Andi Kleen (ak@...e.de) wrote:
> Evgeniy Polyakov <johnpol@....mipt.ru> writes:
> > 
> > Let's then place there a structure with 64bit seconds and nanoseconds,
> > similar to timspec, but without longs there.
> 
> You need 64bit (or at least more than 32bit) for the seconds,
> otherwise you add a y2038 problem which would be sad in new code.
> Remember you might be still alive then ;-)

I hope so :)

> Ok one could argue that on 32bit architectures 2038 is so deeply
> embedded that it doesn't make much difference, but I still
> think it would be better to not readd it to new interfaces there.
> 
> 64bit longs on 32bit is fine, as long as you use aligned_u64,
> never long long or u64 (which has varying alignment between i386 and x86-64)

Btw, aligned_u64 is not exported to userspace.
I commited a change with __u64 nanoseconds without any strucutres.
Do we really need a structure?

> -Andi

-- 
	Evgeniy Polyakov
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