linux-kernel - Re: [REPORT] cfs-v4 vs sd-0.44

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Date:	Sun, 22 Apr 2007 01:48:43 -0700
From:	William Lee Irwin III <wli@...omorphy.com>
To:	Ulrich Drepper <drepper@...il.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Kyle Moffett <mrmacman_g4@....com>, Willy Tarreau <w@....eu>,
	Ingo Molnar <mingo@...e.hu>, Con Kolivas <kernel@...ivas.org>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Nick Piggin <npiggin@...e.de>, Mike Galbraith <efault@....de>,
	Arjan van de Ven <arjan@...radead.org>,
	Peter Williams <pwil3058@...pond.net.au>,
	Thomas Gleixner <tglx@...utronix.de>, caglar@...dus.org.tr,
	Gene Heskett <gene.heskett@...il.com>
Subject: Re: [REPORT] cfs-v4 vs sd-0.44

On 4/22/07, William Lee Irwin III <wli@...omorphy.com> wrote:
>> I'm just looking for what people want the API to be here. With that in
>> hand we can just go out and do whatever needs to be done.

On Sun, Apr 22, 2007 at 12:17:31AM -0700, Ulrich Drepper wrote:
> I think a sched_yield_to is one interface:
>   int sched_yield_to(pid_t);

All clear on that front.


On Sun, Apr 22, 2007 at 12:17:31AM -0700, Ulrich Drepper wrote:
> For futex(), the extension is needed for the FUTEX_WAIT operation.  We
> need a new operation FUTEX_WAIT_FOR or so which takes another (the
> fourth) parameter which is the PID of the target.
> For FUTEX_LOCK_PI we need no extension.  The futex value is the PID of
> the current owner.  This is required for the whole interface to work
> in the first place.

We'll have to send things out and see what sticks here. There seems to
be some pickiness above.


-- wli
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