From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Tue, 26 Sep 2006 17:14:10 +0200
From: Jan Kiszka <jan.kiszka@domain.hid>
MIME-Version: 1.0
Subject: Re: [Adeos-main] [PATCH+HACK] optimise root stalling
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To: "gilles.chanteperdrix" <gilles.chanteperdrix@xenomai.org>
Cc: adeos-main <adeos-main@gna.org>

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gilles.chanteperdrix wrote:
> ---------- Debut du message initial -----------
>=20
> De     : adeos-main-bounces@domain.hid
> A      : adeos-main@gna.org
> Copies :=20
> Date   : Mon, 25 Sep 2006 12:44:02 +0200
> Objet  : Re: [Adeos-main] [PATCH+HACK] optimise root stalling
>=20
>> Jan Kiszka wrote:
>>> ...
>>> A further idea of mine was to inline light-weight parts of the
>>> __ipipe_*_root API on UP (no SMP at hand to judge on it as
> well).
>> BTW: I haven't looked at any detail yet, but would PER_CPU
> here and
>> there (e.g. for ipipe_percpu_domain) buy us something on SMP
> (2.6)?
>=20
> I think to remember that the PER_CPU support uses
> smp_processor_id(),=20
> and we know that smp_processor_id() must not be used over Xenomai
> stacks.
>=20

Not necessarily: per_cpu(var, cpu) retrieves a variable for the given
cpu without touching smp_processor_id.


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