From: Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
To: "Nakajima, Jun" <jun.nakajima-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
Subject: Re: [PATCH 3/8] SVM: add module parameter to disable NestedPaging
Date: Sat, 26 Jan 2008 08:25:56 +0100 [thread overview]
Message-ID: <20080126072556.GB21476@8bytes.org> (raw)
In-Reply-To: <2D848F959C03D945A84E9EDE7F7BFE4274021D-7XlYjKTK0pM64kNsxIetb7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
On Fri, Jan 25, 2008 at 05:47:11PM -0800, Nakajima, Jun wrote:
> Joerg Roedel wrote:
> > To disable the use of the Nested Paging feature even if it is
> available in
> > hardware this patch adds a module parameter. Nested Paging can be
> disabled by
> > passing npt=off to the kvm_amd module.
>
> I think it's better to use a (common) parameter to qemu. That way you
> can control on/off for each VM.
Generally I see no problem with it. But at least for NPT I don't see a
reason why someone should want to disable it on a VM basis (as far as it
works stable). Avi, what do you think?
Joerg
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next prev parent reply other threads:[~2008-01-26 7:25 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-25 20:53 [PATCH][RFC] SVM: Add Support for Nested Paging in AMD Fam16 CPUs Joerg Roedel
2008-01-25 20:53 ` [PATCH 3/8] SVM: add module parameter to disable Nested Paging Joerg Roedel
[not found] ` <1201294393-22613-4-git-send-email-joerg.roedel-5C7GfCeVMHo@public.gmane.org>
2008-01-25 21:35 ` Anthony Liguori
[not found] ` <479A561B.8070009-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2008-01-25 22:10 ` Joerg Roedel
[not found] ` <20080125221029.GA23111-5C7GfCeVMHo@public.gmane.org>
2008-01-26 18:38 ` Avi Kivity
2008-01-26 1:47 ` [PATCH 3/8] SVM: add module parameter to disable NestedPaging Nakajima, Jun
[not found] ` <2D848F959C03D945A84E9EDE7F7BFE4274021D-7XlYjKTK0pM64kNsxIetb7fspsVTdybXVpNB7YpNyf8@public.gmane.org>
2008-01-26 7:25 ` Joerg Roedel [this message]
[not found] ` <20080126072556.GB21476-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2008-01-26 9:49 ` Alexey Eremenko
[not found] ` <7fac565a0801260149j7d6d48demfb49d2bb0d5a952-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-01-26 10:06 ` Joerg Roedel
2008-01-26 16:36 ` Anthony Liguori
2008-01-26 18:23 ` [kvm-devel] " Avi Kivity
[not found] ` <1201294393-22613-1-git-send-email-joerg.roedel-5C7GfCeVMHo@public.gmane.org>
2008-01-25 20:53 ` [PATCH 1/8] SVM: move feature detection to hardware setup code Joerg Roedel
2008-01-25 20:53 ` [PATCH 2/8] SVM: add detection of Nested Paging feature Joerg Roedel
2008-01-25 20:53 ` [PATCH 4/8] X86: export information about NPT to generic x86 code Joerg Roedel
[not found] ` <1201294393-22613-5-git-send-email-joerg.roedel-5C7GfCeVMHo@public.gmane.org>
2008-01-25 21:37 ` Anthony Liguori
[not found] ` <479A56B2.7010306-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2008-01-25 21:40 ` Anthony Liguori
2008-01-27 8:40 ` Avi Kivity
2008-01-25 20:53 ` [PATCH 5/8] MMU: make the __nonpaging_map function generic Joerg Roedel
2008-01-25 20:53 ` [PATCH 6/8] X86: export the load_pdptrs() function to modules Joerg Roedel
2008-01-25 20:53 ` [PATCH 7/8] MMU: add HAP support to the KVM MMU Joerg Roedel
2008-01-25 20:53 ` [PATCH 8/8] SVM: add support for Nested Paging Joerg Roedel
[not found] ` <1201294393-22613-9-git-send-email-joerg.roedel-5C7GfCeVMHo@public.gmane.org>
2008-01-27 8:52 ` Avi Kivity
[not found] ` <479C464E.2060009-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2008-01-27 9:41 ` Joerg Roedel
[not found] ` <20080127094147.GA32677-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2008-01-27 9:51 ` Avi Kivity
[not found] ` <479C540A.8020003-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2008-01-27 10:05 ` Joerg Roedel
[not found] ` <20080127100517.GC32677-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2008-01-27 10:24 ` Avi Kivity
2008-01-25 21:32 ` [PATCH][RFC] SVM: Add Support for Nested Paging in AMD Fam16 CPUs Anthony Liguori
[not found] ` <479A5589.7030201-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2008-01-25 22:47 ` Joerg Roedel
2008-01-26 1:57 ` Nakajima, Jun
2008-01-27 8:57 ` Avi Kivity
[not found] ` <479C4763.1080104-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2008-01-27 9:51 ` Joerg Roedel
2008-01-28 3:20 ` Jeremy Fitzhardinge
[not found] ` <479D4A0C.5080208-TSDbQ3PG+2Y@public.gmane.org>
2008-01-28 11:08 ` Avi Kivity
2008-02-07 12:09 ` Joerg Roedel
2008-02-10 10:35 ` Avi Kivity
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