linux-kernel - Re: [Xen-devel] [PATCH v1 0/5] xen/PMU: PMU support for Xen PV guests

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Date:	Wed, 11 Sep 2013 10:33:49 +0100
From:	David Vrabel <david.vrabel@...rix.com>
To:	Boris Ostrovsky <boris.ostrovsky@...cle.com>
CC:	<xen-devel@...ts.xen.org>, <linux-kernel@...r.kernel.org>,
	<david.vrabel@...rix.com>, <JBeulich@...e.com>
Subject: Re: [Xen-devel] [PATCH v1 0/5] xen/PMU: PMU support for Xen PV guests

On 10/09/13 16:31, Boris Ostrovsky wrote:
> This is the Linux side of Xen PMU support for PV guests, including dom0. Only
> kernel changes are here, toolstack patch will be provided separately.
> 
> Here is description from the hypervisor patch submission that applies to this
> series as well:
> 
> This version has following limitations:
> * For accurate profiling of dom0/Xen dom0 VCPUs should be pinned.
> * Hypervisor code is only profiled on processors that have running dom0 VCPUs
> on them.
> * No backtrace support.

These are some pretty significant limitations.   Is there a plan for how
to remove them?

David
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