Li, Xin B wrote:
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Ulrich Drepper
Sent: Friday, August 03, 2007 2:24 AM
To: Nakajima, Jun
Cc: kvm-devel@lists.sourceforge.net
Subject: Re: [kvm-devel] [PATCH 2/2] Add MSR Bitmap support in VMX
-BEGIN
Rusty Russell wrote:
>> Rusty, what say you to a 'struct page *module_to_page(void *kaddr)'
>> which does the right thing? Attached an implementation.
>>
>
> Hi Avi,
>
> Arch-specific, unfortunately: modules do not need to be allocated with
> vmalloc (and for small modules probably shoul
>-Original Message-
>From: [EMAIL PROTECTED]
>[mailto:[EMAIL PROTECTED] On Behalf Of
>Ulrich Drepper
>Sent: Friday, August 03, 2007 2:24 AM
>To: Nakajima, Jun
>Cc: kvm-devel@lists.sourceforge.net
>Subject: Re: [kvm-devel] [PATCH 2/2] Add MSR Bitmap support in VMX
On Thu, 2007-08-02 at 15:39 +0300, Avi Kivity wrote:
> He, Qing wrote:
> >>
> >> hmm. While there's nothing wrong with the patch, there is a simpler way
> >> to do this:
> >>
> >>static unsigned long vmx_msr_bitmap[PAGE_SIZE / sizeof(unsigned
> >> long)] __aligned(PAGE_SIZE);
> >>
> >> now the
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Nakajima, Jun wrote:
>> Looking at the Linux context switch code, it can bang on MSR_FS_BASE
> and
>> MSR_KERNEL_GS_BASE. A high context switch rate between threads (which
>> use %gs or %fs) can show an improvement with this. Things like kbuild
>> pro
Avi Kivity wrote:
> ron minnich wrote:
> > On 8/2/07, Avi Kivity <[EMAIL PROTECTED]> wrote:
> >
> > > Li, Xin B wrote:
> > >
> > > > > Did you see any performance improvements out of this?
> > > > >
> > > > >
> > > > Acturally we don't expect any obviously performance because MSR
> > > > access
ron minnich wrote:
> On 8/2/07, Avi Kivity <[EMAIL PROTECTED]> wrote:
>
>> Li, Xin B wrote:
>>
Did you see any performance improvements out of this?
>>> Acturally we don't expect any obviously performance because MSR accesses
>>> are not frequent.
>>>
>>>
>> W
On 8/2/07, Avi Kivity <[EMAIL PROTECTED]> wrote:
> Li, Xin B wrote:
> >> Did you see any performance improvements out of this?
> >>
> >
> > Acturally we don't expect any obviously performance because MSR accesses
> > are not frequent.
> >
>
> Well, why do this then?
ah, see, you asked the question
>-Original Message-
>From: Avi Kivity [mailto:[EMAIL PROTECTED]
>Sent: Thursday, August 02, 2007 10:50 PM
>To: Li, Xin B
>Cc: He, Qing; Rusty Russell; kvm-devel@lists.sourceforge.net
>Subject: Re: [kvm-devel] [PATCH 2/2] Add MSR Bitmap support in VMX
>
>Li, Xin
Li, Xin B wrote:
>> Did you see any performance improvements out of this?
>>
>
> Acturally we don't expect any obviously performance because MSR accesses
> are not frequent.
>
Well, why do this then?
--
error compiling committee.c: too many arguments to function
---
>Did you see any performance improvements out of this?
Acturally we don't expect any obviously performance because MSR accesses
are not frequent.
-Xin
-
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Still grepping through lo
Avi Kivity wrote:
> However, I do see an issue with my proposal. To get the physical address
> of the page, we need to use vmalloc_to_page(). But that won't work if
> kvm is built into the kernel (and thus uses large pages for data).
>
Because of this issue, I'd like to apply the patch now and
He, Qing wrote:
>>
>> hmm. While there's nothing wrong with the patch, there is a simpler way
>> to do this:
>>
>>static unsigned long vmx_msr_bitmap[PAGE_SIZE / sizeof(unsigned
>> long)] __aligned(PAGE_SIZE);
>>
>> now there's no need to allocate, error-check, free, or kmap the memory.
>> The
>-Original Message-
>From: [EMAIL PROTECTED]
>[mailto:[EMAIL PROTECTED] On Behalf Of Avi Kivity
>Sent: 2007年8月2日 19:00
>To: Yang, Sheng
>Cc: kvm-devel@lists.sourceforge.net
>Subject: Re: [kvm-devel] [PATCH 2/2] Add MSR Bitmap support in VMX
>
>Yang, Sheng wrote
Yang, Sheng wrote:
> Add MSR Bitmap support in VMX so that some execution of RDMSR or WRMSR
> won't cause a VM exit.
>
> Signed-off-by: Sheng Yang <[EMAIL PROTECTED]>
> Signed-off-by: Qing He <[EMAIL PROTECTED]>
> ---
> drivers/kvm/vmx.c | 44 +++-
> drive
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