linux-kernel - Re: [ck] Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2

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Message-ID: <7d01f9f00703121709p66381704ic2dc10e90fdbf3d6@mail.gmail.com>
Date:	Tue, 13 Mar 2007 01:09:33 +0100
From:	"Thibaut VARENE" <T-Bone@...isc-linux.org>
To:	"michael chang" <thenewme91@...il.com>
Cc:	"Con Kolivas" <kernel@...ivas.org>, "ck list" <ck@....kolivas.org>,
	"linux kernel mailing list" <linux-kernel@...r.kernel.org>
Subject: Re: [ck] Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2

On 3/12/07, michael chang <thenewme91@...il.com> wrote:

> Considering the concepts put out by projects such as BOINC and
> SETI@...e, I wouldn't be thoroughly surprised by this ideology,
> although I do question the particular way this test case is being run.

If Con actually implements SCHED_IDLEPRIO in RSDL, life is good even
in that case.

> This seems to me like he's saying that there has to be a mechanism
> (outside of nice) that can be used to treat processes that "I" want to
> be interactive all special-like. It feels like something that would
> have been said in the design of what the scheduler was in -ck and is
> currently in vanilla.

Exactly. Driving us again toward the fact that different workloads
might benefit from different schedulers (eg: RSDL is cool for server
loads, previous staircase did an excellent job on desktop, etc) and
thus that having a choice of schedulers might be something that would
satisfy (some) people...

> To me, that fundamentally clashes with the design behind RSDL. That
> said, I could be wrong -- Con appears to have something that could be
> very promising up his sleeve that could come out sooner or later. Once
> he's written it, of course. In any case, RSDL seems very promising,
> for the most part.

It certainly is. "Negative" feedback can be a good thing too, as it
helps improving it anyway. It's nonetheless true that it's practically
impossible to satisfy 100% of use case with a single design, so
choices will have to be made.

HTH

T-Bone

-- 
Thibaut VARENE
http://www.parisc-linux.org/~varenet/
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