From: "Nadav Har'El" <nyh@math.technion.ac.il>
To: "Tian, Kevin" <kevin.tian@intel.com>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"gleb@redhat.com" <gleb@redhat.com>,
"avi@redhat.com" <avi@redhat.com>
Subject: Re: [PATCH 07/31] nVMX: Introduce vmcs02: VMCS used to run L2
Date: Fri, 20 May 2011 23:32:11 +0300 [thread overview]
Message-ID: <20110520203211.GA5519@fermat.math.technion.ac.il> (raw)
In-Reply-To: <625BA99ED14B2D499DC4E29D8138F1505C9BEEFE8F@shsmsx502.ccr.corp.intel.com>
On Fri, May 20, 2011, Tian, Kevin wrote about "RE: [PATCH 07/31] nVMX: Introduce vmcs02: VMCS used to run L2":
> btw, shouldn't you clear recycled VMCS and reset 'cpu' and 'launched' fields?
Well, I believe the answer is "no": As far as I understood, a host is allowed
to take a VMCS that has been used once to launch a certain guest, and then
modify all the VMCS's fields to define a completely different guest, and then
VMRESUME it, without doing the regular VMCLEAR/VMLAUNCH, even though it's
"a different guest". Is there something wrong in my assumption? Does VMX keep
anything constant between successive VMRESUMEs?
> Have you tried SMP L2 guest?
It "sort of" works, but it *does* appear to still have a bug which I didn't
yet have the time to hunt... In one case, for example, an 8-vcpu L2 on an
8-vcpu L1 seemed to work well (e.g., doing parallel make) for about a minute,
and then hung with some sort of page fault in the kernel.
Nadav.
--
Nadav Har'El | Friday, May 20 2011, 17 Iyyar 5771
nyh@math.technion.ac.il |-----------------------------------------
Phone +972-523-790466, ICQ 13349191 |Anyone is entitled to their own opinions.
http://nadav.harel.org.il |No one is entitled to their own facts.
next prev parent reply other threads:[~2011-05-20 20:32 UTC|newest]
Thread overview: 118+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-16 19:43 [PATCH 0/31] nVMX: Nested VMX, v10 Nadav Har'El
2011-05-16 19:44 ` [PATCH 01/31] nVMX: Add "nested" module option to kvm_intel Nadav Har'El
2011-05-16 19:44 ` [PATCH 02/31] nVMX: Implement VMXON and VMXOFF Nadav Har'El
2011-05-20 7:58 ` Tian, Kevin
2011-05-16 19:45 ` [PATCH 03/31] nVMX: Allow setting the VMXE bit in CR4 Nadav Har'El
2011-05-16 19:45 ` [PATCH 04/31] nVMX: Introduce vmcs12: a VMCS structure for L1 Nadav Har'El
2011-05-16 19:46 ` [PATCH 05/31] nVMX: Implement reading and writing of VMX MSRs Nadav Har'El
2011-05-16 19:46 ` [PATCH 06/31] nVMX: Decoding memory operands of VMX instructions Nadav Har'El
2011-05-16 19:47 ` [PATCH 07/31] nVMX: Introduce vmcs02: VMCS used to run L2 Nadav Har'El
2011-05-20 8:04 ` Tian, Kevin
2011-05-20 8:48 ` Tian, Kevin
2011-05-20 20:32 ` Nadav Har'El [this message]
2011-05-22 2:00 ` Tian, Kevin
2011-05-22 7:22 ` Nadav Har'El
2011-05-24 0:54 ` Tian, Kevin
2011-05-22 8:29 ` Nadav Har'El
2011-05-24 1:03 ` Tian, Kevin
2011-05-16 19:48 ` [PATCH 08/31] nVMX: Fix local_vcpus_link handling Nadav Har'El
2011-05-17 13:19 ` Marcelo Tosatti
2011-05-17 13:35 ` Avi Kivity
2011-05-17 14:35 ` Nadav Har'El
2011-05-17 14:42 ` Marcelo Tosatti
2011-05-17 17:57 ` Nadav Har'El
2011-05-17 15:11 ` Avi Kivity
2011-05-17 18:11 ` Nadav Har'El
2011-05-17 18:43 ` Marcelo Tosatti
2011-05-17 19:30 ` Nadav Har'El
2011-05-17 19:52 ` Marcelo Tosatti
2011-05-18 5:52 ` Nadav Har'El
2011-05-18 8:31 ` Avi Kivity
2011-05-18 9:02 ` Nadav Har'El
2011-05-18 9:16 ` Avi Kivity
2011-05-18 12:08 ` Marcelo Tosatti
2011-05-18 12:19 ` Nadav Har'El
2011-05-22 8:57 ` Nadav Har'El
2011-05-23 15:49 ` Avi Kivity
2011-05-23 16:17 ` Gleb Natapov
2011-05-23 18:59 ` Nadav Har'El
2011-05-23 19:03 ` Gleb Natapov
2011-05-23 16:43 ` Roedel, Joerg
2011-05-23 16:51 ` Avi Kivity
2011-05-24 9:22 ` Roedel, Joerg
2011-05-24 9:28 ` Nadav Har'El
2011-05-24 9:57 ` Roedel, Joerg
2011-05-24 10:08 ` Avi Kivity
2011-05-24 10:12 ` Nadav Har'El
2011-05-23 18:51 ` Nadav Har'El
2011-05-24 2:22 ` Tian, Kevin
2011-05-24 7:56 ` Nadav Har'El
2011-05-24 8:20 ` Tian, Kevin
2011-05-24 11:05 ` Avi Kivity
2011-05-24 11:20 ` Tian, Kevin
2011-05-24 11:27 ` Avi Kivity
2011-05-24 11:30 ` Tian, Kevin
2011-05-24 11:36 ` Avi Kivity
2011-05-24 11:40 ` Tian, Kevin
2011-05-24 11:59 ` Nadav Har'El
2011-05-24 0:57 ` Tian, Kevin
2011-05-18 8:29 ` Avi Kivity
2011-05-16 19:48 ` [PATCH 09/31] nVMX: Add VMCS fields to the vmcs12 Nadav Har'El
2011-05-20 8:22 ` Tian, Kevin
2011-05-16 19:49 ` [PATCH 10/31] nVMX: Success/failure of VMX instructions Nadav Har'El
2011-05-16 19:49 ` [PATCH 11/31] nVMX: Implement VMCLEAR Nadav Har'El
2011-05-16 19:50 ` [PATCH 12/31] nVMX: Implement VMPTRLD Nadav Har'El
2011-05-16 19:50 ` [PATCH 13/31] nVMX: Implement VMPTRST Nadav Har'El
2011-05-16 19:51 ` [PATCH 14/31] nVMX: Implement VMREAD and VMWRITE Nadav Har'El
2011-05-16 19:51 ` [PATCH 15/31] nVMX: Move host-state field setup to a function Nadav Har'El
2011-05-16 19:52 ` [PATCH 16/31] nVMX: Move control field setup to functions Nadav Har'El
2011-05-16 19:52 ` [PATCH 17/31] nVMX: Prepare vmcs02 from vmcs01 and vmcs12 Nadav Har'El
2011-05-24 8:02 ` Tian, Kevin
2011-05-24 9:19 ` Nadav Har'El
2011-05-24 10:52 ` Tian, Kevin
2011-05-16 19:53 ` [PATCH 18/31] nVMX: Implement VMLAUNCH and VMRESUME Nadav Har'El
2011-05-24 8:45 ` Tian, Kevin
2011-05-24 9:45 ` Nadav Har'El
2011-05-24 10:54 ` Tian, Kevin
2011-05-25 8:00 ` Tian, Kevin
2011-05-25 13:26 ` Nadav Har'El
2011-05-26 0:42 ` Tian, Kevin
2011-05-16 19:53 ` [PATCH 19/31] nVMX: No need for handle_vmx_insn function any more Nadav Har'El
2011-05-16 19:54 ` [PATCH 20/31] nVMX: Exiting from L2 to L1 Nadav Har'El
2011-05-24 12:58 ` Tian, Kevin
2011-05-24 13:43 ` Nadav Har'El
2011-05-25 0:55 ` Tian, Kevin
2011-05-25 8:06 ` Nadav Har'El
2011-05-25 8:23 ` Tian, Kevin
2011-05-25 2:43 ` Tian, Kevin
2011-05-25 13:21 ` Nadav Har'El
2011-05-26 0:41 ` Tian, Kevin
2011-05-16 19:54 ` [PATCH 21/31] nVMX: vmcs12 checks on nested entry Nadav Har'El
2011-05-25 3:01 ` Tian, Kevin
2011-05-25 5:38 ` Nadav Har'El
2011-05-25 7:33 ` Tian, Kevin
2011-05-16 19:55 ` [PATCH 22/31] nVMX: Deciding if L0 or L1 should handle an L2 exit Nadav Har'El
2011-05-25 7:56 ` Tian, Kevin
2011-05-25 13:45 ` Nadav Har'El
2011-05-16 19:55 ` [PATCH 23/31] nVMX: Correct handling of interrupt injection Nadav Har'El
2011-05-25 8:39 ` Tian, Kevin
2011-05-25 8:45 ` Tian, Kevin
2011-05-25 10:56 ` Nadav Har'El
2011-05-25 9:18 ` Tian, Kevin
2011-05-25 12:33 ` Nadav Har'El
2011-05-25 12:55 ` Tian, Kevin
2011-05-16 19:56 ` [PATCH 24/31] nVMX: Correct handling of exception injection Nadav Har'El
2011-05-16 19:56 ` [PATCH 25/31] nVMX: Correct handling of idt vectoring info Nadav Har'El
2011-05-25 10:02 ` Tian, Kevin
2011-05-25 10:13 ` Nadav Har'El
2011-05-25 10:17 ` Tian, Kevin
2011-05-16 19:57 ` [PATCH 26/31] nVMX: Handling of CR0 and CR4 modifying instructions Nadav Har'El
2011-05-16 19:57 ` [PATCH 27/31] nVMX: Further fixes for lazy FPU loading Nadav Har'El
2011-05-16 19:58 ` [PATCH 28/31] nVMX: Additional TSC-offset handling Nadav Har'El
2011-05-16 19:58 ` [PATCH 29/31] nVMX: Add VMX to list of supported cpuid features Nadav Har'El
2011-05-16 19:59 ` [PATCH 30/31] nVMX: Miscellenous small corrections Nadav Har'El
2011-05-16 19:59 ` [PATCH 31/31] nVMX: Documentation Nadav Har'El
2011-05-25 10:33 ` Tian, Kevin
2011-05-25 11:54 ` Nadav Har'El
2011-05-25 12:11 ` Tian, Kevin
2011-05-25 12:13 ` Muli Ben-Yehuda
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20110520203211.GA5519@fermat.math.technion.ac.il \
--to=nyh@math.technion.ac.il \
--cc=avi@redhat.com \
--cc=gleb@redhat.com \
--cc=kevin.tian@intel.com \
--cc=kvm@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.