From: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
To: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: tzanussi@gmail.com, akpm@linux-foundation.org,
compudj@krystal.dyndns.org, linux-kernel@vger.kernel.org,
righi.andrea@gmail.com
Subject: Re: [PATCH 3/3] relay: Add buffer-only channels; useful for early logging.
Date: Fri, 13 Jun 2008 18:54:14 +0300 [thread overview]
Message-ID: <20080613185414.306b4baa@linux360.ro> (raw)
In-Reply-To: <48521C19.6070001@cs.helsinki.fi>
On Fri, 13 Jun 2008 10:04:57 +0300
Pekka Enberg <penberg@cs.helsinki.fi> wrote:
> Why do we need to change for_each_online_cpu to for_each_present_cpu?
> I guess it's because we don't have all the CPUs online at early
> boot?
Yes, that's true. Only one CPU is online at that early point.
> Wouldn't it then be better to implement CPU hotplug support
> instead?
It's difficult for me to write such code, as I'm unable to test CPU
hotplug; my machines are a Turion X2 laptop and a Athlon Barton desktop
computer. So I can't turn off, or unplug in a software sense, one CPU core.
Correct me if I'm wrong, but I don't see any way to do that in /sys/devices/system/cpu/
But I suppose I could write a patch very carefully, and then submit to
someone that can test this. Anyway, I'll look into this and try to
understand the code without being able to test.
Eduard
next prev parent reply other threads:[~2008-06-13 15:55 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-13 1:10 [PATCH 3/3] relay: Add buffer-only channels; useful for early logging Eduard - Gabriel Munteanu
2008-06-13 7:04 ` Pekka Enberg
2008-06-13 15:54 ` Eduard - Gabriel Munteanu [this message]
2008-06-16 12:30 ` Mathieu Desnoyers
2008-06-16 13:37 ` Eduard - Gabriel Munteanu
2008-06-17 13:53 ` Mathieu Desnoyers
2008-06-14 16:10 ` Eduard - Gabriel Munteanu
2008-06-16 12:35 ` Mathieu Desnoyers
2008-06-16 13:30 ` Eduard - Gabriel Munteanu
-- strict thread matches above, loose matches on Subject: below --
2008-06-23 12:31 Eduard - Gabriel Munteanu
2008-07-03 6:06 ` Andrew Morton
2008-07-05 4:14 ` Eduard - Gabriel Munteanu
2008-07-05 6:32 ` Andrew Morton
2008-08-06 17:32 ` Mathieu Desnoyers
2008-06-21 14:11 Eduard - Gabriel Munteanu
2008-06-22 19:24 ` Pekka Enberg
2008-06-22 19:29 ` Pekka Enberg
2008-06-22 20:51 ` Eduard - Gabriel Munteanu
2008-06-15 15:05 Eduard - Gabriel Munteanu
2008-06-17 14:35 ` Mathieu Desnoyers
2008-06-12 20:26 Eduard - Gabriel Munteanu
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