From: "Jan Beulich" <jbeulich@novell.com>
To: duyuyang@gmail.com, pasik@iki.fi
Cc: xen-devel@lists.xensource.com
Subject: Re: PV kernel boot parameter maxcpus has no effect?
Date: Wed, 28 Apr 2010 08:22:28 +0100 [thread overview]
Message-ID: <4BD7F046020000780005CFEE@vpn.id2.novell.com> (raw)
>>> Pasi Kärkkäinen 04/28/10 8:33 AM >>>
>On Wed, Apr 28, 2010 at 11:07:36AM +0800, Yuyang Du wrote:
>> Hi all,
>>
>> I have a two-socket (each socket processor has 4 cores) machine, but only want to use one socket processor. I give pv
dom0 boot parameter maxcpus=4, but in fact there is no effect, other cpus 4-7 are still used. Is this a bug or
something?
>>
>
>You need to give _Xen_ (xen.gz) option dom0_max_vcpus=X
Yes and no - the other scenario also has its use case (i.e. have Dom0 initially just bring up a subset of the vCPU-s it
has been given).
However, given that the bringing up of secondary CPUs happens from common (even arch-independent) code, the whole issue
seems a little suspicious - namely what indication he uses to see that there are more than 4 vCPU-s in use by Dom0.
Jan
next reply other threads:[~2010-04-28 7:22 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-28 7:22 Jan Beulich [this message]
-- strict thread matches above, loose matches on Subject: below --
2010-04-28 3:07 PV kernel boot parameter maxcpus has no effect? Yuyang Du
2010-04-28 6:32 ` Pasi Kärkkäinen
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