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Re: [Xen-devel] [Patch 2 of 2]: PV-domain SMP performance Linux-part

from [Keir Fraser] [Permanent Link][Original]
To: James Harper <james.harper@xxxxxxxxxxxxxxxx>, Juergen Gross <juergen.gross@xxxxxxxxxxxxxxxxxxx>, Venefax <venefax@xxxxxxxxx>
Subject: Re: [Xen-devel] [Patch 2 of 2]: PV-domain SMP performance Linux-part
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Fri, 16 Jan 2009 11:14:28 +0000
Cc: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx
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On 16/01/2009 11:01, "James Harper" <james.harper@xxxxxxxxxxxxxxxx> wrote:

> But only in spinlocks that I 'own' completely right? I'm more concerned
> about spinlocks that I share with Windows (eg in NDIS).

So only some critical sections will be pv'ed? Then the best you can
currently do is yield-on-spin in your custom spin_lock().

 -- Keir



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