From: Ian Campbell <Ian.Campbell@citrix.com>
To: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: Re: [Xen-devel] [PATCH] xen/cpu: Make VCPU hotplug code online CPUs properly.
Date: Fri, 10 Feb 2012 15:03:46 +0000 [thread overview]
Message-ID: <1328886226.6133.271.camel@zakaz.uk.xensource.com> (raw)
In-Reply-To: <1328885033-8450-2-git-send-email-konrad.wilk@oracle.com>
On Fri, 2012-02-10 at 14:43 +0000, Konrad Rzeszutek Wilk wrote:
> Offlining CPUs works. Onlining does not work anymore and it looks
> like we were missing a cpu_up() call in the hotplug bring up path.
Wasn't this a deliberate decision as part of the pvops upstreaming to be
consistent with native cpu hotplug? After hotplugging a CPU
administrator action is needed to actually online it.
http://xen.1045712.n5.nabble.com/cpu-down-but-no-cpu-up-in-drivers-xen-cpu-hotplug-c-td2545244.html
The fix is to add a udev rule:
http://wiki.xen.org/wiki/Paravirt_Linux_CPU_Hotplug
Ian.
next prev parent reply other threads:[~2012-02-10 15:03 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-10 14:43 [PATCH] vcpu hotplug fix for v3.3-rc3 (v1) Konrad Rzeszutek Wilk
2012-02-10 14:43 ` [PATCH] xen/cpu: Make VCPU hotplug code online CPUs properly Konrad Rzeszutek Wilk
2012-02-10 15:03 ` Ian Campbell [this message]
2012-02-10 15:42 ` [Xen-devel] " Konrad Rzeszutek Wilk
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