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 shouldn't
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 +++-
-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:
Add MSR Bitmap support in VMX so
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 io bitmaps can
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
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
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
-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 B wrote:
Did you see any
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.
Well, why do this then?
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 I was going to
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
accesses are not frequent.
-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
probably
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 there's no need to
-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 PGP SIGNED MESSAGE
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 +++-
drivers/kvm/vmx.h |3 +++
2 files
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