From: "Jan Beulich" <jbeulich@novell.com>
To: Keir Fraser <Keir.Fraser@cl.cam.ac.uk>
Cc: xen-devel@lists.xensource.com
Subject: Re: [PATCH] x86 linux: prevent halted VCPUs from eating up CPU bandwidth
Date: Tue, 30 May 2006 11:21:54 +0200 [thread overview]
Message-ID: <447C2AD2.76E4.0078.0@novell.com> (raw)
In-Reply-To: <f0e21bc1a2f91b9210b91e92ac864b51@cl.cam.ac.uk>
>>> Keir Fraser <Keir.Fraser@cl.cam.ac.uk> 30.05.06 10:49 >>>
>
>On 30 May 2006, at 09:11, Jan Beulich wrote:
>
>> Indeed, this was the behavior I intended, but somehow I failed to find
>> the VCPUOP_down operation that I was looking
>> for. Here's an updated patch.
>
>Given that you went for the more complicated definition of halt() that
>calls block when event delivery is enabled, is it actually necessary to
>not compile the halt-checking routine? If event delivery is enabled in
What halt-checking routine do you mean here?
>that function, shouldn't we return from each invocation of halt() on
>(at least) each timer interrupt? If not, I wonder why our behaviour
>there differs from native?
Yes, I think the net effect should be similar behavior to native.
Jan
next prev parent reply other threads:[~2006-05-30 9:21 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-29 14:35 [PATCH] x86 linux: prevent halted VCPUs from eating up CPU bandwidth Jan Beulich
2006-05-29 14:59 ` Keir Fraser
2006-05-30 8:11 ` Jan Beulich
2006-05-30 8:49 ` Keir Fraser
2006-05-30 9:21 ` Jan Beulich [this message]
2006-05-30 9:30 ` Keir Fraser
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