From: Ashok Raj <ashok.raj@intel.com>
To: linux-ia64@vger.kernel.org
Subject: Re: [Lhns-devel] Re: Who's doing what with cpu/memory/node hotplug?
Date: Mon, 17 May 2004 16:00:03 +0000 [thread overview]
Message-ID: <20040517090002.A6922@unix-os.sc.intel.com> (raw)
In-Reply-To: <20040513150842.22F5.YGOTO@us.fujitsu.com>
On Mon, May 17, 2004 at 10:38:49AM +0200, Matthias Fouquet-Lapar wrote:
> > But, the story on ppc64 is pretty much that the firmware detects the
> > kinds of hardware failures that we handle, Linux is just notified of it
> > afterword.
>
> I think I'm not quite sure why you need hotplug to balance CPUs between
> partitons. (You are not moving physical components for this, right ?)
Don't always equate HOTPLUG with physical removal/addition.
In the above case of balancing between partitions, its a still a hotplug
wrt the kernel, where the cpu is removed from os image (say scheduler etc)
and reintroduce the new resource to another running partition.
Physical removal/addition requires one extra step in addition to what is done
currently, i.e firmware interaction with the OS to handle device arrival and
eject notifications... these mechanisms are often platoform independent, one
example of such a mechanism would be ACPI.
Cheers,
ashok
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next prev parent reply other threads:[~2004-05-17 16:00 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-14 0:13 [Lhns-devel] Re: Who's doing what with cpu/memory/node hotplug? Yasunori Goto
2004-05-14 1:06 ` Paul Jackson
2004-05-14 1:28 ` Dave Hansen
2004-05-14 2:09 ` Jesse Barnes
2004-05-14 3:02 ` Keiichiro Tokunaga
2004-05-14 3:21 ` Dave Hansen
2004-05-17 2:34 ` Kenji Kaneshige
2004-05-17 5:31 ` Dave Hansen
2004-05-17 7:35 ` Matthias Fouquet-Lapar
2004-05-17 8:23 ` Dave Hansen
2004-05-17 8:38 ` Matthias Fouquet-Lapar
2004-05-17 15:45 ` Grant Grundler
2004-05-17 15:52 ` Dave Hansen
2004-05-17 16:00 ` Ashok Raj [this message]
2004-05-17 19:15 ` Matthias Fouquet-Lapar
2004-05-17 23:01 ` Matthew Dobson
2004-05-17 23:18 ` Luck, Tony
2004-05-17 23:28 ` Dave Hansen
2004-05-17 23:36 ` Jesse Barnes
2004-05-17 23:54 ` Grant Grundler
2004-05-18 14:58 ` Russ Anderson
2004-05-18 20:16 ` Ashok Raj
2004-05-18 21:01 ` Jack Steiner
2004-05-18 21:05 ` Andi Kleen
2004-05-18 21:12 ` Greg KH
2004-05-19 5:25 ` Matthias Fouquet-Lapar
2004-05-19 9:17 ` Paul Jackson
2004-05-19 9:30 ` Matthias Fouquet-Lapar
2004-05-19 10:22 ` Paul Jackson
2004-05-19 14:40 ` Howell, David P
2004-05-19 14:56 ` Matthias Fouquet-Lapar
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