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

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Message-Id: <20060823.003516.30182824.davem@davemloft.net>
Date:	Wed, 23 Aug 2006 00:35:16 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	akpm@...l.org
Cc:	johnpol@....mipt.ru, sundell.software@...il.com,
	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.

From: Andrew Morton <akpm@...l.org>
Date: Wed, 23 Aug 2006 00:07:58 -0700

> I wonder whether designing-in a millisecond granularity is the right thing
> to do.  If in a few years the kernel is running tickless with high-res clock
> interrupt sources, that might look a bit lumpy.
> 
> Switching it to a __u64 nanosecond counter would be basically free on
> 64-bit machines, and not very expensive on 32-bit, no?

If it ends up in a structure we'll need to use the "aligned_u64" type
in order to avoid problems with 32-bit x86 binaries running on 64-bit
kernels.
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