linux-kernel - Re: -mm merge plans for 2.6.23

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Message-ID: <46A5C8B0.5060401@imap.cc>
Date:	Tue, 24 Jul 2007 11:38:56 +0200
From:	Tilman Schmidt <tilman@...p.cc>
To:	Ray Lee <ray-lk@...rabbit.org>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Jesper Juhl <jesper.juhl@...il.com>,
	ck list <ck@....kolivas.org>, Ingo Molnar <mingo@...e.hu>,
	Paul Jackson <pj@....com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: -mm merge plans for 2.6.23

Ray Lee schrieb:
> I spend a lot of time each day watching my computer fault my
> workingset back in when I switch contexts. I'd rather I didn't have to
> do that. Unfortunately, that's a pretty subjective problem report. For
> whatever it's worth, we have pretty subjective solution reports
> pointing to swap prefetch as providing a fix for them.

Add me.

> My concern is that a subjective problem report may not be good enough.

That's my impression too, seeing the insistence on numbers.

> So, what do I measure to make this an objective problem report?

That seems to be the crux of the matter: how to measure subjective
usability issues (aka user experience) when simple reports along the
lines of "A is much better than B for everyday work" are not enough.
The same problem already impaired the "fair scheduler" discussion.
It would really help to have a clear direction there.

-- 
Tilman Schmidt                    E-Mail: tilman@...p.cc
Bonn, Germany
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