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xen-devel
[Xen-devel] RE: Passive domain support in Xenoprof 2.0
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To: |
"Santos, Jose Renato G" <joserenato.santos@xxxxxx> |
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Subject: |
[Xen-devel] RE: Passive domain support in Xenoprof 2.0 |
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From: |
"Yang, Xiaowei" <xiaowei.yang@xxxxxxxxx> |
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Date: |
Mon, 13 Feb 2006 17:32:06 +0800 |
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Cc: |
"Turner, Yoshio" <yoshio_turner@xxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, "Dong, Eddie" <eddie.dong@xxxxxxxxx>, G John Janakiraman <john@xxxxxxxxxxxxxxxxxxx>, "Zhai, Edwin" <edwin.zhai@xxxxxxxxx> |
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Mon, 13 Feb 2006 09:44:04 +0000 |
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Thread-topic: |
Passive domain support in Xenoprof 2.0 |
Santos, Jose Renato G wrote:
> Xiaowei,
>
> The passive domain support implementation for Xen 2.0 had
> some race conditions and that was the reason it was removed
> from the patches for the Xen 3.0 implementation. The buffers
> that are used to store PC samples do not use any
> locks since they need to be accessed in NMI context.
> In the previous implementation, samples of passive domains
> were stored in dom0's buffer. This created the possibility
> of a race condition if dom0 and a passive domain were
> running on 2 different CPUs and accessing the buffer
> simultaneously.
>
Hi Renato,
Now I know your concern. Yes, I can work on passive domain support.
Thanks!
-Xiaowei
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