From: Marcelo Tosatti <mtosatti@redhat.com>
To: "David S. Ahern" <daahern@cisco.com>
Cc: kvm@vger.kernel.org
Subject: Re: [patch 00/13] RFC: out of sync shadow
Date: Fri, 12 Sep 2008 15:09:06 -0300 [thread overview]
Message-ID: <20080912180906.GA3309@dmt.cnet> (raw)
In-Reply-To: <48CA86C3.8020800@cisco.com>
On Fri, Sep 12, 2008 at 09:12:03AM -0600, David S. Ahern wrote:
>
>
> Marcelo Tosatti wrote:
> > On Thu, Sep 11, 2008 at 10:05:12PM -0600, David S. Ahern wrote:
> >
> > David,
> >
> > Please reload the kvm-intel module with "bypass_guest_pf=0" option.
> >
> >
>
> DOH. You mentioned that in your description, and I forgot to disable it.
> Works fine now.
>
> Guest behavior is amazing. After 30 min of uptime, kscand shows only
> 17secs of cpu usage. Before, kscand was hitting over a minute after
> about 10 minutes of uptime.
Great. Note that its not fully optimized for the RHEL3 highpte kscand
case, which calls invlpg for present pagetable entries.
The current patchset simply invalidates the shadow on invlpg, meaning
that the next access will cause a pagefault exit.
It can instead read the guest pte and prefault, saving one exit per
test-and-clear-accessed operation.
next prev parent reply other threads:[~2008-09-12 18:10 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-06 18:48 [patch 00/13] RFC: out of sync shadow Marcelo Tosatti
2008-09-06 18:48 ` [patch 01/13] x86/mm: get_user_pages_fast_atomic Marcelo Tosatti
2008-09-07 8:42 ` Avi Kivity
2008-09-08 6:10 ` Marcelo Tosatti
2008-09-08 14:20 ` Avi Kivity
2008-09-06 18:48 ` [patch 02/13] KVM: MMU: switch to get_user_pages_fast Marcelo Tosatti
2008-09-07 8:45 ` Avi Kivity
2008-09-07 20:44 ` Marcelo Tosatti
2008-09-08 14:53 ` Avi Kivity
2008-09-09 12:21 ` Andrea Arcangeli
2008-09-09 13:57 ` Avi Kivity
2008-09-06 18:48 ` [patch 03/13] KVM: MMU: gfn_to_page_atomic Marcelo Tosatti
2008-09-06 18:48 ` [patch 04/13] KVM: MMU: switch prefetch_page to gfn_to_page_atomic Marcelo Tosatti
2008-09-06 18:48 ` [patch 05/13] KVM: MMU: do not write-protect large mappings Marcelo Tosatti
2008-09-07 9:04 ` Avi Kivity
2008-09-07 20:54 ` Marcelo Tosatti
2008-09-06 18:48 ` [patch 06/13] KVM: MMU: global page keeping Marcelo Tosatti
2008-09-07 9:16 ` Avi Kivity
2008-09-06 18:48 ` [patch 07/13] KVM: MMU: mode specific sync_page Marcelo Tosatti
2008-09-07 9:52 ` Avi Kivity
2008-09-08 6:03 ` Marcelo Tosatti
2008-09-08 9:50 ` Avi Kivity
2008-09-06 18:48 ` [patch 08/13] KVM: MMU: record guest root level on struct guest_walker Marcelo Tosatti
2008-09-06 18:48 ` [patch 09/13] KVM: MMU: out of sync shadow core Marcelo Tosatti
2008-09-07 11:01 ` Avi Kivity
2008-09-08 7:19 ` Marcelo Tosatti
2008-09-08 14:51 ` Avi Kivity
2008-09-11 8:19 ` Marcelo Tosatti
2008-09-11 13:15 ` Marcelo Tosatti
2008-09-06 18:48 ` [patch 10/13] KVM: MMU: sync roots on mmu reload Marcelo Tosatti
2008-09-06 18:48 ` [patch 11/13] KVM: MMU: sync global pages on cr0/cr4 writes Marcelo Tosatti
2008-09-06 18:48 ` [patch 12/13] KVM: x86: trap invlpg Marcelo Tosatti
2008-09-07 11:14 ` Avi Kivity
2008-09-06 18:48 ` [patch 13/13] KVM: MMU: ignore multiroot when unsyncing global pages Marcelo Tosatti
2008-09-07 11:22 ` [patch 00/13] RFC: out of sync shadow Avi Kivity
2008-09-08 7:23 ` Marcelo Tosatti
2008-09-08 14:56 ` Avi Kivity
2008-09-12 4:05 ` David S. Ahern
2008-09-12 11:51 ` Marcelo Tosatti
2008-09-12 15:12 ` David S. Ahern
2008-09-12 18:09 ` Marcelo Tosatti [this message]
2008-09-12 18:19 ` David S. Ahern
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