From: "Michel Dänzer" <michel@daenzer•net>
To: Benjamin Herrenschmidt <benh@kernel•crashing.org>
Cc: linuxppc-dev@ozlabs•org, Felix Radensky <felix@embedded-sol•com>
Subject: Re: Preemption question (4xx related)
Date: Thu, 02 Jul 2009 11:14:29 +0200 [thread overview]
Message-ID: <1246526069.7938.1542.camel@thor> (raw)
In-Reply-To: <1246486393.14483.14.camel@pasglop>
On Thu, 2009-07-02 at 08:13 +1000, Benjamin Herrenschmidt wrote:
> On Tue, 2009-06-30 at 05:55 -0700, Felix Radensky wrote:
> > Hi,
> >=20
> > Preemption is disabled on the vast majority of powerpc
> > targets. Are there any known problems in this area ?
> > I'd like to enable CONFIG_PREEMPT_VOLUNTARY on
> > AMCC 405EX target, to increase application responsiveness.
> > Is it a bad idea ?
>=20
> In theory it should work, but as you may have noticed, it's generally
> disabled and thus not very well tested.
>=20
> It would be a good idea for us, some of the core devs, to turn that on
> in our usual test configs in fact.
FWIW, on my PowerBook I've been running with CONFIG_PREEMPT_VOLUNTARY
enabled for a long time (more than a year). No problems so far, and it
definitely seems to help a lot for interactivity.
--=20
Earthling Michel D=C3=A4nzer | http://www.vmware.c=
om
Libre software enthusiast | Debian, X and DRI developer
prev parent reply other threads:[~2009-07-02 9:24 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-30 12:55 Preemption question (4xx related) Felix Radensky
2009-07-01 22:13 ` Benjamin Herrenschmidt
2009-07-02 0:14 ` Josh Boyer
2009-07-02 7:33 ` Benjamin Herrenschmidt
2009-07-02 11:12 ` Josh Boyer
2009-07-02 22:41 ` Benjamin Herrenschmidt
2009-07-03 0:34 ` Josh Boyer
2009-07-02 9:14 ` Michel Dänzer [this message]
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