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Subject: Re: [RFC][PATCH 02/22] sched: add extended scheduling interface
From: Raistlin <raistlin@linux.it>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
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On Thu, 2010-11-11 at 15:08 +0100, Peter Zijlstra wrote:
> I'm not really a fan of schedstat, esp if you have to use it very
> frequently, the overhead of open()+read()+close() + parsing text is
> quite high.
>=20
> Then again, if people are really going to use this (big if I guess) we
> could add yet another syscall for this or whatever.
>=20
Ok, we'll see at that time.

> grmbl, so I was going to say, just pad it to a nice 2^n size, but then I
> saw that struct timespec is defined as two long's, which means we're
> going to have to do compat crap.
>=20
> Thomas is there a sane time format in existence? I thought the whole
> purpose of timeval/timespec was to avoid having to use a u64, but then
> using longs as opposed to int totally defeats the purpose.=20
>=20
Fine, and u64 will be. Going for that...

> > what about the len <=3D=3D sizeof(struct sched_param2) in
> > sched_{set,get}{param,scheduler}2()... Does this still make sense, or
> > are we removing it?=20
>=20
> Since we're going for a constant sized structure we might as well take
> it out.
>
... and for that!

thanks,
Dario

--=20
<<This happens because I choose it to happen!>> (Raistlin Majere)
----------------------------------------------------------------------
Dario Faggioli, ReTiS Lab, Scuola Superiore Sant'Anna, Pisa  (Italy)

http://blog.linux.it/raistlin / raistlin@ekiga.net /
dario.faggioli@jabber.org

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