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Re: [Xen-ia64-devel] [PATCH] RESEND: Enable hash vtlb on dom0&domU

from [Alex Williamson]

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To:	"Xu, Anthony" <anthony.xu@xxxxxxxxx>
Subject:	Re: [Xen-ia64-devel] [PATCH] RESEND: Enable hash vtlb on dom0&domU
From:	Alex Williamson <alex.williamson@xxxxxx>
Date:	Wed, 29 Mar 2006 11:06:51 -0700
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On Thu, 2006-03-30 at 00:39 +0800, Xu, Anthony wrote:
> This patch is intended to enable hash vtlb on dom0&domU.
> It's an option, and is turned off by default.
> If you want to turn on it, uncomment below line in file 
> xen/arch/ia64/Rules.mk.
> #CFLAGS  += -DHASH_VHPT

Hi Anthony,

   Do we have any actual performance data to indicate whether enabling
this is a good thing?  If it is a good thing, should it be turned on by
default?  I'm a little reluctant to apply a patch for which the bulk of
the new functionality is #ifdef'd out and there's no description of when
or why we might want to enable it.  Thanks,

    Alex

-- 
Alex Williamson                             HP Linux & Open Source Lab

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