From: Avi Kivity <avi@redhat.com>
To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>, kvm <kvm@vger.kernel.org>,
qemu-devel <qemu-devel@nongnu.org>
Subject: Re: qemu-kvm upstreaming: Do we want -kvm-shadow-memory semantics?
Date: Wed, 25 Jan 2012 13:38:54 +0200 [thread overview]
Message-ID: <4F1FE9CE.5050401@redhat.com> (raw)
In-Reply-To: <4F185535.1060908@siemens.com>
On 01/19/2012 07:39 PM, Jan Kiszka wrote:
> On 2012-01-19 18:28, Marcelo Tosatti wrote:
> > On Thu, Jan 19, 2012 at 01:46:39PM +0100, Jan Kiszka wrote:
> >> Hi again,
> >>
> >> do we need some KVM knob comparable to qemu-kvm's -kvm-shadow-memory in
> >> upstream?
> >>
> >> If yes: The underlying IOCTL is x86-only. Are other archs interested in
> >> this long-term as well, ie. should the control become arch-independent?
> >>
> >> Jan
> >
> > Last time i asked about removal, Avi wished for it to remain.
> >
>
> Then I guess he should comment on this after returning to work. :)
-kvm-shadow-memory is becoming less meaningful for ordinary workloads
since everything uses TDP these days. It's still meaningful for testing
(forcing aggressive cache replacement), or perhaps nested virtualization.
--
error compiling committee.c: too many arguments to function
WARNING: multiple messages have this Message-ID (diff)
From: Avi Kivity <avi@redhat.com>
To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
qemu-devel <qemu-devel@nongnu.org>, kvm <kvm@vger.kernel.org>
Subject: Re: [Qemu-devel] qemu-kvm upstreaming: Do we want -kvm-shadow-memory semantics?
Date: Wed, 25 Jan 2012 13:38:54 +0200 [thread overview]
Message-ID: <4F1FE9CE.5050401@redhat.com> (raw)
In-Reply-To: <4F185535.1060908@siemens.com>
On 01/19/2012 07:39 PM, Jan Kiszka wrote:
> On 2012-01-19 18:28, Marcelo Tosatti wrote:
> > On Thu, Jan 19, 2012 at 01:46:39PM +0100, Jan Kiszka wrote:
> >> Hi again,
> >>
> >> do we need some KVM knob comparable to qemu-kvm's -kvm-shadow-memory in
> >> upstream?
> >>
> >> If yes: The underlying IOCTL is x86-only. Are other archs interested in
> >> this long-term as well, ie. should the control become arch-independent?
> >>
> >> Jan
> >
> > Last time i asked about removal, Avi wished for it to remain.
> >
>
> Then I guess he should comment on this after returning to work. :)
-kvm-shadow-memory is becoming less meaningful for ordinary workloads
since everything uses TDP these days. It's still meaningful for testing
(forcing aggressive cache replacement), or perhaps nested virtualization.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2012-01-25 11:39 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-19 12:46 qemu-kvm upstreaming: Do we want -kvm-shadow-memory semantics? Jan Kiszka
2012-01-19 12:46 ` [Qemu-devel] " Jan Kiszka
2012-01-19 13:24 ` Alexander Graf
2012-01-19 13:24 ` Alexander Graf
2012-01-19 13:30 ` Jan Kiszka
2012-01-19 13:30 ` Jan Kiszka
2012-01-19 13:42 ` Alexander Graf
2012-01-19 13:42 ` Alexander Graf
2012-01-19 17:28 ` Marcelo Tosatti
2012-01-19 17:28 ` [Qemu-devel] " Marcelo Tosatti
2012-01-19 17:39 ` Jan Kiszka
2012-01-19 17:39 ` [Qemu-devel] " Jan Kiszka
2012-01-25 11:38 ` Avi Kivity [this message]
2012-01-25 11:38 ` Avi Kivity
2012-01-25 11:57 ` Jan Kiszka
2012-01-25 11:57 ` [Qemu-devel] " Jan Kiszka
2012-01-25 12:04 ` Avi Kivity
2012-01-25 12:04 ` [Qemu-devel] " Avi Kivity
2012-01-25 12:10 ` Jan Kiszka
2012-01-25 12:10 ` [Qemu-devel] " Jan Kiszka
2012-01-25 12:15 ` Avi Kivity
2012-01-25 12:26 ` Jan Kiszka
2012-01-25 12:33 ` Avi Kivity
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