Hi all,
On a sidenote:
I have also realized that when using the tun/tap configuration with
a bridge, packets are replicated on all tap devices when QEMU writes
packets to the tun interface. I guess this is a limitation of
tun/tap as it does not know to which tap device the packet has to
Alex Williamson wrote:
Perhaps we should update the bitmap on entry points that everyone uses
so we don't have to worry about preallocating. We could set the bitmap
in kvm_add_routing_entry() and clear it in kvm_del_routing_entry().
This would mean that kvm_del_routing_entry() implicitly gives
Am Montag 18 Mai 2009 16:26:15 schrieb Avi Kivity:
Christian Borntraeger wrote:
Sorry for the late question, but I missed your first version. Is there a
way to change that code to use virtio instead of PCI? That would allow us
to use this driver on s390 and maybe other virtio transports.
Christian Bornträger wrote:
To summarize, Anthony thinks it should use virtio, while I believe
virtio is useful for exporting guest memory, not for importing host memory.
I think the current virtio interface is not ideal for importing host memory,
but we can change that. If you look at
Gregory Haskins wrote:
More slop. I shouldn't send patches out first thing Monday morning, I
guess.
Here is my current delta queued for v10. I will wait for some feedback
on v9 before cutting it:
With this, v10 looks good to go.
--
error compiling committee.c: too many arguments to
Gleb Natapov wrote:
Forget to remove debug output before submitting. Resending.
Signed-off-by: Gleb Natapov g...@redhat.com
diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c
index 1ccb50c..d32ceac 100644
--- a/arch/x86/kvm/i8259.c
+++ b/arch/x86/kvm/i8259.c
@@ -218,6 +218,11 @@ int
Gleb Natapov wrote:
The problem exists only on VMX. Also currently we skip this step if
there is pending exception. The patch fixes this too.
Applied, thanks.
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Gleb Natapov wrote:
Most of the time IRR is empty, so instead of scanning the whole IRR on
each VM entry keep a variable that tells us if IRR is not empty. IRR
will have to be scanned twice on each IRQ delivery, but this is much more
rare than VM entry.
static inline int
Avi Kivity wrote:
Antoine Martin wrote:
Hi,
Here is another one, any ideas?
These oopses do look quite deep. Is it normal to end up in tcp_send_ack
from pdflush??
I think it can happen anywhere, part of the net softirq.
Hah, gotcha.
Cheers
Antoine
[929492.154634] pdflush: page
Antoine Martin wrote:
You're out of memory.
That's quite odd, the guest wasn't even hitting the swap at the tine.
But you do have swap enabled?
Strange, seems to be a bit of free memory here.
There should be lots, all this host is doing is apache+sftp...
Assuming I can
Support source-id checking for interrupt remapping, and then
isolates interrupts for guests/VMs with assigned devices.
v1 - v2 change log:
Access PCI directly (read_pci_config_byte) to parse IOAPIC,
instead of PCI related discovery, because PCI subsystem is not
initialized at that time.
Interrupt remapping table entry is 128bits. Currently, it only sets low
64bits of irte in modify_irte and free_irte. This ignores high 64bits
setting of irte, that means source-id setting will be ignored. This patch
sets the whole 128bits of irte when modify/free it. Following source-id
checking
Ingo Molnar wrote:
* Han, Weidong weidong@intel.com wrote:
Ingo Molnar wrote:
* Han, Weidong weidong@intel.com wrote:
Siddha, Suresh B wrote:
On Wed, 2009-05-06 at 23:16 -0700, Han, Weidong wrote:
@@ -634,6 +694,44 @@ static int ir_parse_ioapic_scope(struct
Avi Kivity wrote:
Antoine Martin wrote:
You're out of memory.
That's quite odd, the guest wasn't even hitting the swap at the tine.
But you do have swap enabled?
Yes.
I always do this on the guests as it seems fairer to let the guests use
swap when they need the extra memory rather
SVM adds another way to do INVLPG by ASID which Hyper-V makes use of,
so let's implement it!
For now we just do the same thing invlpg does, as asid switching
means we flush the mmu anyways. That might change one day though.
v2 makes invlpga do the same as invlpg, not flush the whole mmu
Now that we have nested SVM in place, let's make use of it and virtualize
something non-kvm.
The first interesting target that came to my mind here was Hyper-V.
This patchset makes Windows Server 2008 boot with Hyper-V, which runs
the dom0 in virtualized mode already. It hangs somewhere in IDE
While trying to get Hyper-V running, I realized that the interrupt injection
mechanisms that are in place right now are not 100% correct.
This patch makes nested SVM's interrupt injection behave more like on a
real machine.
v2 calls BUG_ON when svm_set_irq is called with GIF=0
Signed-off-by:
Hyper-V tried to access MSR_IGNNE, so let's at least have a definition
for it in our headers.
Signed-off-by: Alexander Graf ag...@suse.de
---
arch/x86/include/asm/msr-index.h |1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/msr-index.h
Cam, is it somehow possible to generate a local APIC interrupt from one VM to
another? I guess it shouldn't be as the LAPIC interrupts generated in one VM
will go to the VCPUs of the same VM...
Regards,
Bhaskar.
-Original Message-
From: kvm-ow...@vger.kernel.org
Jayaraman, Bhaskar wrote:
Cam, is it somehow possible to generate a local APIC interrupt from one VM to
another? I guess it shouldn't be as the LAPIC interrupts generated in one VM
will go to the VCPUs of the same VM...
Regards,
Bhaskar.
The closest thing to this is the
* Weidong Han weidong@intel.com wrote:
To support domain-isolation usages, the platform hardware must be
capable of uniquely identifying the requestor (source-id) for each
interrupt message. Without source-id checking for interrupt
remapping , a rouge guest/VM with assigned devices
* Weidong Han weidong@intel.com wrote:
Interrupt remapping table entry is 128bits. Currently, it only sets low
64bits of irte in modify_irte and free_irte. This ignores high 64bits
setting of irte, that means source-id setting will be ignored. This patch
sets the whole 128bits of irte
Alexander Graf wrote:
SVM adds another way to do INVLPG by ASID which Hyper-V makes use of,
so let's implement it!
For now we just do the same thing invlpg does, as asid switching
means we flush the mmu anyways. That might change one day though.
v2 makes invlpga do the same as invlpg, not
Alexander Graf wrote:
Hyper-V uses some MSRs, some of which are actually reserved for BIOS usage.
But let's be nice today and have it its way, because otherwise it fails
terribly.
v2 changes:
- remove the 0x4081 MSR definition
- add pr_unimpl() on unimplemented writes
Signed-off-by:
Antoine Martin wrote:
But you do have swap enabled?
Yes.
I always do this on the guests as it seems fairer to let the guests use
swap when they need the extra memory rather than over-committing too
much memory on the host. Although it would probably be more efficient
overall to let the
On 19.05.2009, at 14:58, Avi Kivity wrote:
Alexander Graf wrote:
SVM adds another way to do INVLPG by ASID which Hyper-V makes use of,
so let's implement it!
For now we just do the same thing invlpg does, as asid switching
means we flush the mmu anyways. That might change one day though.
v2
Alexander Graf wrote:
I think that for ASID!=0 you can actually do nothing. The guest
entry is a cr3 switch, so we'll both get a tlb flush and a resync on
any modified ptes.
Right, the only situation I can imagine this isn't fulfilled is when
INVLPGA isn't trapped in the 1st level guest,
On Tue, May 19, 2009 at 12:54:03PM +0200, Alexander Graf wrote:
While trying to get Hyper-V running, I realized that the interrupt injection
mechanisms that are in place right now are not 100% correct.
This patch makes nested SVM's interrupt injection behave more like on a
real machine.
On Tue, May 19, 2009 at 03:58:52PM +0300, Avi Kivity wrote:
Alexander Graf wrote:
SVM adds another way to do INVLPG by ASID which Hyper-V makes use of,
so let's implement it!
For now we just do the same thing invlpg does, as asid switching
means we flush the mmu anyways. That might change
Marcelo Tosatti wrote:
I think that for ASID!=0 you can actually do nothing. The guest entry
is a cr3 switch, so we'll both get a tlb flush and a resync on any
modified ptes.
For ASID==0 you can do the invlpg thing.
Marcelo?
kvm_mmu_invlpg is cheap, better just invalidate the
On Tue, May 19, 2009 at 04:56:48PM +0300, Avi Kivity wrote:
Marcelo Tosatti wrote:
I think that for ASID!=0 you can actually do nothing. The guest
entry is a cr3 switch, so we'll both get a tlb flush and a resync on
any modified ptes.
For ASID==0 you can do the invlpg thing.
Marcelo?
On Mon, May 18, 2009 at 10:00 PM, Avi Kivity a...@redhat.com wrote:
Raju Srivastava wrote:
Greetings,
Could someone let me know if current virtio-net supports zero-copy? I
see some discussion here:
http://thread.gmane.org/gmane.comp.emulators.kvm.devel/28061/
(copyless virtio net thoughts)
Latest qemu-kvm.git fails with ./configure, and reverting
22d239bcee126742df46938ee8ddc7c6b9209e23 corrects it.
Beth Kon
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On 19.05.2009, at 15:58, Marcelo Tosatti wrote:
On Tue, May 19, 2009 at 04:56:48PM +0300, Avi Kivity wrote:
Marcelo Tosatti wrote:
I think that for ASID!=0 you can actually do nothing. The guest
entry is a cr3 switch, so we'll both get a tlb flush and a
resync on
any modified ptes.
Beth Kon wrote:
Latest qemu-kvm.git fails with ./configure, and reverting
22d239bcee126742df46938ee8ddc7c6b9209e23 corrects it.
Works for me. What error do you get?
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Avi Kivity wrote:
Beth Kon wrote:
Latest qemu-kvm.git fails with ./configure, and reverting
22d239bcee126742df46938ee8ddc7c6b9209e23 corrects it.
Works for me. What error do you get?
./configure: 1364: Syntax error: ( unexpected (expecting fi)
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Beth Kon wrote:
Avi Kivity wrote:
Beth Kon wrote:
Latest qemu-kvm.git fails with ./configure, and reverting
22d239bcee126742df46938ee8ddc7c6b9209e23 corrects it.
Works for me. What error do you get?
./configure: 1364: Syntax error: ( unexpected (expecting fi)
Ah, a non-bash shell,
On Tue, May 19, 2009 at 05:18:07PM +0200, Alexander Graf wrote:
On 19.05.2009, at 15:58, Marcelo Tosatti wrote:
On Tue, May 19, 2009 at 04:56:48PM +0300, Avi Kivity wrote:
Marcelo Tosatti wrote:
I think that for ASID!=0 you can actually do nothing. The guest
entry is a cr3 switch, so
Alexander Graf wrote:
kvm_mmu_invlpg is cheap, better just invalidate the entry. If hyper-v
uses invlpga to invalidate TLB entries which it has updated pte's in
memory for, and you skip the invalidation now and somehow later use an
unsync spte, you're toast.
But won't the guest entry cause a
Avi Kivity wrote:
Christian Bornträger wrote:
To summarize, Anthony thinks it should use virtio, while I believe
virtio is useful for exporting guest memory, not for importing host
memory.
I think the current virtio interface is not ideal for importing host
memory, but we can change
Hi Avi,
here is the cpuinfo - what do you mean with workload? The CPU isage is
around 33%.
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 CPU T5600 @ 1.83GHz
stepping: 2
cpu MHz :
On Sun, 2009-05-17 at 10:43 -0500, Anthony Liguori wrote:
From: Mark McLoughlin mar...@redhat.com
If you do e.g. set_link virtio.0 down and there are packets
pending on the tap interface, we currently buffer a packet
and constantly try and send it until the link is up again.
We actually
Bugs item #2793994, was opened at 2009-05-19 19:52
Message generated for change (Tracker Item Submitted) made by benb
You can respond by visiting:
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Please note that this message will contain a full copy of the
Bugs item #2793994, was opened at 2009-05-19 19:52
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Avi Kivity wrote:
Anthony Liguori wrote:
I'd strongly recommend working these patches on qemu-devel and lkml.
I suspect Avi may disagree with me, but in order for this to be
eventually merged in either place, you're going to have additional
requirements put on you.
I don't disagree with
Christian Bornträger wrote:
Am Montag 18 Mai 2009 16:26:15 schrieb Avi Kivity:
Christian Borntraeger wrote:
Sorry for the late question, but I missed your first version. Is there a
way to change that code to use virtio instead of PCI? That would allow us
to use this driver on s390 and
From 67f831e825b64be5dedae9936ff8a60b884959f2 Mon Sep 17 00:00:00 2001
From: mark.langsd...@amd.com
Date: Tue, 19 May 2009 07:46:11 -0500
Subject: [PATCH]
This feature creates a new field in the VMCB called Pause
Filter Count. If Pause Filter Count is greater than 0 and
intercepting PAUSEs is
Hi,
With the latest qemu-kvm and 2.6.30-rc6 kernel i am not able to get
the guest debugging with gdb. I get the following error.
$gdb ./vmlinux
GNU gdb 6.8-debian
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
http://gnu.org/licenses/gpl.html
This is
On Wed, May 20, 2009 at 12:23:12AM +0530, Aneesh Kumar K.V wrote:
Hi,
With the latest qemu-kvm and 2.6.30-rc6 kernel i am not able to get
the guest debugging with gdb. I get the following error.
$gdb ./vmlinux
GNU gdb 6.8-debian
Copyright (C) 2008 Free Software Foundation, Inc.
License
Ingo Molnar mi...@elte.hu writes:
* Weidong Han weidong@intel.com wrote:
To support domain-isolation usages, the platform hardware must be
capable of uniquely identifying the requestor (source-id) for each
interrupt message. Without source-id checking for interrupt
remapping , a
Am Dienstag, den 19.05.2009, 10:45 +0300 schrieb Avi Kivity:
Hi,
GuestHost
kvm1 --- eth0 -+- bridge0 --- vlan1 \
| +-- eth0
kvm2 -+- eth0 -/ /
\- eth1 --- bridge1 --- vlan2 +
When sending packets
We're currently using a counter to track the most recent GSI we've
handed out. This quickly hits KVM_MAX_IRQ_ROUTES when using device
assignment with a driver that regularly toggles the MSI enable bit
(such as Linux kernels 2.6.21-26). This can mean only a few minutes
of usable run time.
I recently read the following paper from 2004 that discusses ACK-
compression in a VMware GSX 2.5.1 environment.
http://www.cs.clemson.edu/~jmarty/papers/ccn2004.pdf
I was wondering if anyone had checked to see if KVM also suffers from
ACK-compression as you increase the number of VMs on each
Hi Avi,
I am trying to build the kvm with changed repositories. I was trying
to follow the instructions from here:
http://www.linux-kvm.org/page/Code. Especially this section: building
an external module with older kernels from that page.
I find the kernel directory is missing in the
Plain QEMU has the parameter -no-shutdown. This avoids termination of the qemu
process when VM got shutdown (e.g. to still use the QEMU-Monitor with stopped
VM). This parameter has no effect on qemu-kvm, today.
This patch introduces identical handling, as in qemu, of -no-shutdown for
qemu-kvm:
On Wed, 20 May 2009 02:21:08 am Cam Macdonell wrote:
Avi Kivity wrote:
Christian Bornträger wrote:
To summarize, Anthony thinks it should use virtio, while I believe
virtio is useful for exporting guest memory, not for importing host
memory.
Yes, precisely.
But what's it *for*, this
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