linux-kernel - Re: [PATCH/RFC v1 0/2] Human readable performance event description in sysfs

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Date:	Wed, 20 Jan 2010 15:26:49 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Michał Nazarewicz <m.nazarewicz@...sung.com>
Cc:	Russell King - ARM Linux <linux@....linux.org.uk>,
	Jamie Iles <jamie.iles@...ochip.com>, jpihet@...sta.com,
	p.osciak@...sung.com, will.deacon@....com,
	linux-kernel@...r.kernel.org, kyungmin.park@...sung.com,
	mingo@...e.hu, m.szyprowski@...sung.com,
	linux-arm-kernel@...ts.infradead.org,
	Tomasz Fujak <t.fujak@...sung.com>
Subject: Re: [PATCH/RFC v1 0/2] Human readable performance event
 description in sysfs

On Wed, 2010-01-20 at 15:16 +0100, Peter Zijlstra wrote:
> On Wed, 2010-01-20 at 15:09 +0100, Michał Nazarewicz wrote:
> > On Wed, 20 Jan 2010 15:01:20 +0100, Peter Zijlstra <peterz@...radead.org> wrote:
> > > It seems to me userspace might care about the exact platform they're
> > > running on.
> > 
> > In my humble opinion, user space should never care about platform it's
> > running on.  Interfaces provided by kernel should suffice to implement
> > abstraction layer between user space and hardware.  If we abandon that
> > we're back in DOS times.  But hey, again, that's just my opinion.
> 
> Well, you're completely right. But the often sad reality is that perfect
> abstraction is either impossible or prohibitively expensive.

And then there is the simple matter of knowing what kind of box it is
without having to resort to a screwdriver or worse.

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