From: Ingo Molnar <mingo@elte.hu>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Jackson <pj@sgi.com>,
tglx@linutronix.de, oleg@tv-sign.ru, rostedt@goodmis.org,
maxk@qualcomm.com, linux-kernel@vger.kernel.org,
rientjes@google.com
Subject: Re: [RFC/PATCH] cpuset: cpuset irq affinities
Date: Fri, 29 Feb 2008 22:29:08 +0100 [thread overview]
Message-ID: <20080229212908.GM27212@elte.hu> (raw)
In-Reply-To: <1204319674.6243.145.camel@lappy>
* Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:
> > Do these irqs have any special hardware affinity? Or are they just
> > consumers of CPU cycles that can be jammed onto whatever CPU(s)
> > we're willing to let be interrupted?
>
> Depends a bit, the genirq layer seems to allow for irqs that can't be
> freely placed. But most of them can be given a free mask - /me looks @
> tglx/ingo.
yes - and when they cannot be arbitrarily migrated we just dont move
them (but still keep them attached to that cpuset). The affinity calls
will just fail in that case. Might want to emit a kernel warning but
that's all. (if then it's a hardware constraint)
Ingo
next prev parent reply other threads:[~2008-02-29 21:30 UTC|newest]
Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-27 22:21 [RFC/PATCH 0/4] CPUSET driven CPU isolation Peter Zijlstra
2008-02-27 22:21 ` [RFC/PATCH 1/4] sched: remove isolcpus Peter Zijlstra
2008-02-27 23:57 ` Max Krasnyanskiy
2008-02-28 10:19 ` Peter Zijlstra
2008-02-28 19:36 ` Max Krasnyansky
2008-02-27 22:21 ` [RFC/PATCH 2/4] cpuset: system sets Peter Zijlstra
2008-02-27 23:39 ` Paul Jackson
2008-02-28 1:53 ` Max Krasnyanskiy
2008-02-27 23:52 ` Max Krasnyanskiy
2008-02-28 0:11 ` Paul Jackson
2008-02-28 0:29 ` Steven Rostedt
2008-02-28 1:45 ` Max Krasnyanskiy
2008-02-28 3:41 ` Steven Rostedt
2008-02-28 4:58 ` Max Krasnyansky
2008-02-27 22:21 ` [RFC/PATCH 3/4] genirq: system set irq affinities Peter Zijlstra
2008-02-28 0:10 ` Max Krasnyanskiy
2008-02-28 10:19 ` Peter Zijlstra
2008-02-27 22:21 ` [RFC/PATCH 4/4] kthread: system set kthread affinities Peter Zijlstra
2008-02-27 23:38 ` [RFC/PATCH 0/4] CPUSET driven CPU isolation Max Krasnyanskiy
2008-02-28 10:19 ` Peter Zijlstra
2008-02-28 17:33 ` Max Krasnyanskiy
2008-02-28 7:50 ` Ingo Molnar
2008-02-28 8:08 ` Paul Jackson
2008-02-28 9:08 ` Ingo Molnar
2008-02-28 9:17 ` Paul Jackson
2008-02-28 9:32 ` David Rientjes
2008-02-28 10:12 ` David Rientjes
2008-02-28 10:26 ` Peter Zijlstra
2008-02-28 17:37 ` Paul Jackson
2008-02-28 21:24 ` David Rientjes
2008-02-28 22:46 ` Paul Jackson
2008-02-28 23:00 ` David Rientjes
2008-02-29 0:16 ` Paul Jackson
2008-02-29 1:05 ` David Rientjes
2008-02-29 3:34 ` Paul Jackson
2008-02-29 4:00 ` David Rientjes
2008-02-29 6:53 ` Paul Jackson
2008-02-28 10:46 ` Ingo Molnar
2008-02-28 17:47 ` Paul Jackson
2008-02-28 20:11 ` Max Krasnyansky
2008-02-28 20:13 ` Paul Jackson
2008-02-28 20:26 ` Max Krasnyansky
2008-02-28 20:27 ` Paul Jackson
2008-02-28 20:45 ` Max Krasnyansky
2008-02-28 20:23 ` Max Krasnyansky
2008-02-28 17:48 ` Max Krasnyanskiy
2008-02-29 8:31 ` Andrew Morton
2008-02-29 8:36 ` Andrew Morton
2008-02-29 9:10 ` Ingo Molnar
2008-02-29 18:06 ` Max Krasnyanskiy
2008-02-28 12:12 ` Mark Hounschell
2008-02-28 19:57 ` Max Krasnyansky
2008-02-29 18:55 ` [RFC/PATCH] cpuset: cpuset irq affinities Peter Zijlstra
2008-02-29 19:02 ` Ingo Molnar
2008-02-29 20:52 ` Max Krasnyanskiy
2008-02-29 21:03 ` Peter Zijlstra
2008-02-29 21:20 ` Max Krasnyanskiy
2008-03-03 11:57 ` Peter Zijlstra
2008-03-03 17:36 ` Paul Jackson
2008-03-03 17:57 ` Peter Zijlstra
2008-03-03 18:10 ` Paul Jackson
2008-03-03 18:18 ` Peter Zijlstra
2008-03-04 7:35 ` Paul Jackson
2008-03-04 11:06 ` Peter Zijlstra
2008-03-04 19:52 ` Max Krasnyanskiy
2008-03-05 1:11 ` Paul Jackson
2008-03-05 8:37 ` Peter Zijlstra
2008-03-05 8:50 ` Ingo Molnar
2008-03-05 12:35 ` Paul Jackson
2008-03-05 12:43 ` Ingo Molnar
2008-03-05 17:44 ` Paul Jackson
2008-03-05 19:17 ` Max Krasnyansky
2008-03-06 13:47 ` Paul Jackson
2008-03-06 15:21 ` Peter Zijlstra
2008-03-07 3:40 ` Paul Jackson
2008-03-07 6:39 ` Paul Jackson
2008-03-07 8:47 ` Paul Menage
2008-03-07 14:57 ` Paul Jackson
2008-03-03 18:41 ` Paul Menage
2008-03-03 18:52 ` Paul Jackson
2008-03-04 5:26 ` Paul Menage
2008-03-04 6:15 ` Paul Jackson
2008-03-04 6:21 ` Paul Menage
2008-03-04 6:26 ` Paul Jackson
2008-03-04 6:34 ` Paul Menage
2008-03-04 6:51 ` Paul Jackson
2008-02-29 20:55 ` Paul Jackson
2008-02-29 21:14 ` Peter Zijlstra
2008-02-29 21:29 ` Ingo Molnar [this message]
2008-02-29 21:32 ` Ingo Molnar
2008-02-29 21:42 ` Max Krasnyanskiy
2008-02-29 22:00 ` Paul Jackson
2008-02-29 21:53 ` Paul Jackson
2008-03-02 5:18 ` Christoph Hellwig
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