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Date: Sun, 22 Apr 2007 01:48:43 -0700
From: William Lee Irwin III <wli@holomorphy.com>
To: Ulrich Drepper <drepper@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
       Kyle Moffett <mrmacman_g4@mac.com>, Willy Tarreau <w@1wt.eu>,
       Ingo Molnar <mingo@elte.hu>, Con Kolivas <kernel@kolivas.org>,
       linux-kernel@vger.kernel.org, Andrew Morton <akpm@linux-foundation.org>,
       Nick Piggin <npiggin@suse.de>, Mike Galbraith <efault@gmx.de>,
       Arjan van de Ven <arjan@infradead.org>,
       Peter Williams <pwil3058@bigpond.net.au>,
       Thomas Gleixner <tglx@linutronix.de>, caglar@pardus.org.tr,
       Gene Heskett <gene.heskett@gmail.com>
Subject: Re: [REPORT] cfs-v4 vs sd-0.44
Message-ID: <20070422084843.GJ2986@holomorphy.com>
References: <20070421154614.GA26169@elte.hu> <20070421161818.GC7840@1wt.eu> <alpine.LFD.0.98.0704210931370.9964@woody.linux-foundation.org> <20070421164241.GF2986@holomorphy.com> <E1192E83-5E64-4782-8F92-DDCA09CA2F55@mac.com> <a36005b50704211249pb771b79k227914515b5f9906@mail.gmail.com> <alpine.LFD.0.98.0704211634130.9964@woody.linux-foundation.org> <a36005b50704211846g4ed1256fpad6a3a5670318314@mail.gmail.com> <20070422070238.GH2986@holomorphy.com> <a36005b50704220017y664eef89u5f78f1e089c5014@mail.gmail.com>
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On 4/22/07, William Lee Irwin III <wli@holomorphy.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