On Fri, May 09, 2014 at 01:53:32PM +0200, Paolo Bonzini wrote:
Il 09/05/2014 04:28, Marcelo Tosatti ha scritto:
Alex,
Unability to upgrade systems is not an excuse to fix the bug in the
wrong place.
It may be an excuse to fix the bug in both places though.
Paolo
Actually, its messy to
On Mon, May 12, 2014 at 10:26:37PM +0200, Alexander Graf wrote:
On 09.05.14 13:53, Paolo Bonzini wrote:
Il 09/05/2014 04:28, Marcelo Tosatti ha scritto:
Alex,
Unability to upgrade systems is not an excuse to fix the bug in the
wrong place.
It may be an excuse to fix the bug in both
Updating system_time from the kernel clock once master clock
has been enabled can result in time backwards event, in case
kernel clock frequency is lower than TSC frequency.
Disable master clock in case its necessary to update it
from the resume path.
Signed-off-by: Marcelo Tosatti
Il 13/05/2014 16:55, Paolo Bonzini ha scritto:
Until now, KVM used to assume that CS.RPL could always be used as the CPL
value when KVM_SET_SREGS is called. Unfortunately this is not the case.
If userspace decides to call KVM_GET_SREGS/KVM_SET_SREGS exactly after
CR0.PE has been set to 1, but
CS.RPL is not equal to the CPL in the few instructions between
setting CR0.PE and reloading CS. And CS.DPL is also not equal
to the CPL for conforming code segments.
However, SS.DPL *is* always equal to the CPL except for the weird
case of SYSRET on AMD processors, which sets SS.DPL=SS.RPL from
On Tue, 13 May 2014 18:15:27 +0300
Michael S. Tsirkin m...@redhat.com wrote:
On Tue, May 13, 2014 at 04:29:58PM +0200, Romain Francoise wrote:
Michael S. Tsirkin m...@redhat.com writes:
Please dont' do this, extra indirection hurts performance.
Instead, please change vhost_net_open
Il 13/05/2014 17:04, Paolo Bonzini ha scritto:
KVM used to assume that CS.RPL could always be used as the CPL
value when KVM_SET_SREGS is called. QEMU could call KVM_GET_SREGS
and the KVM_SET_SREGS exactly after CR0.PE has been set to 1,
but before the long jump that reloads CS. Then, KVM
https://bugzilla.kernel.org/show_bug.cgi?id=76141
Bug ID: 76141
Summary: kvm intel nested virtualization get PANIC: double
fault, error_code: 0x0
Product: Virtualization
Version: unspecified
Kernel Version: 3.12.18
On Tue, 13 May 2014 09:29:37 -0600
Eric Blake ebl...@redhat.com wrote:
Hi Eric,
On 05/13/2014 09:00 AM, Michael Mueller wrote:
This patch implements a new QMP request named query-cpu-model. It returns
the cpu model of cpu 0. eg:
request: '{execute : query-cpu-model }
answer:
Il 14/05/2014 09:26, Marcelo Tosatti ha scritto:
Updating system_time from the kernel clock once master clock
has been enabled can result in time backwards event, in case
kernel clock frequency is lower than TSC frequency.
Disable master clock in case its necessary to update it
from the resume
Updating system_time from the kernel clock once master clock
has been enabled can result in time backwards event, in case
kernel clock frequency is lower than TSC frequency.
Disable master clock in case its necessary to update it
from the resume path.
Signed-off-by: Marcelo Tosatti
On Wed, May 14, 2014 at 11:09:36AM +0200, Paolo Bonzini wrote:
Il 14/05/2014 09:26, Marcelo Tosatti ha scritto:
Updating system_time from the kernel clock once master clock
has been enabled can result in time backwards event, in case
kernel clock frequency is lower than TSC frequency.
Il 14/05/2014 12:06, Marcelo Tosatti ha scritto:
Updating system_time from the kernel clock once master clock
has been enabled can result in time backwards event, in case
kernel clock frequency is lower than TSC frequency.
Disable master clock in case its necessary to update it
from the resume
https://bugzilla.kernel.org/show_bug.cgi?id=76141
Paolo Bonzini bonz...@gnu.org changed:
What|Removed |Added
CC||bonz...@gnu.org
---
Hi,
Recently I've investigated issues around SKBTX_DEV_ZEROCOPY skbs where
the frags list were modified. I came across this function skb_shift(),
which moves frags between skbs. And there are a lot more of such kind,
skb_split or skb_try_coalesce, for example.
It could be a dangerous thing if
https://bugzilla.kernel.org/show_bug.cgi?id=76191
Bug ID: 76191
Summary: vt-d intel IOMMU - jump label: negative count!
Product: Virtualization
Version: unspecified
Kernel Version: Linux venus 3.12-1-amd64 #1 SMP Debian 3.12.9-1
On Wed, 2014-05-14 at 14:40 +0100, Zoltan Kiss wrote:
Hi,
Recently I've investigated issues around SKBTX_DEV_ZEROCOPY skbs where
the frags list were modified. I came across this function skb_shift(),
which moves frags between skbs. And there are a lot more of such kind,
skb_split or
Greetings all,
Though I don't believe that this is KVM problem per se, I'm seeing very
poor network performance when using windows 2008R2 KVM instances with
the virtio driver when on a 10G network. iperf results show linux VMs
getting close to wire speeds, while windows only does about
Updating system_time from the kernel clock once master clock
has been enabled can result in time backwards event, in case
kernel clock frequency is lower than TSC frequency.
Disable master clock in case its necessary to update it
from the resume path.
Signed-off-by: Marcelo Tosatti
Il 14/05/2014 17:43, Marcelo Tosatti ha scritto:
Updating system_time from the kernel clock once master clock
has been enabled can result in time backwards event, in case
kernel clock frequency is lower than TSC frequency.
Disable master clock in case its necessary to update it
from the resume
On Wed, May 07, 2014 at 05:40:13PM -0700, Mario Smarduch wrote:
Patch adds HYP interface for global VM TLB invalidation without address
parameter.
- Added ARM version of kvm_flush_remote_tlbs()
Signed-off-by: Mario Smarduch m.smard...@samsung.com
---
arch/arm/include/asm/kvm_asm.h |
2014-05-13 15:47-0400, Waiman Long:
On 05/12/2014 11:22 AM, Radim Krčmář wrote:
I think there is an unwanted scenario on virtual machines:
1) VCPU sets the pending bit and start spinning.
2) Pending VCPU gets descheduled.
- we have PLE and lock holder isn't running [1]
- the
On Wed, May 14, 2014 at 06:51:24PM +0200, Radim Krčmář wrote:
Ok.
I've seen merit in pvqspinlock even with slightly slower first-waiter,
so I would have happily sacrificed those horrible branches.
(I prefer elegant to optimized code, but I can see why we want to be
strictly better than
From: Eric Dumazet eric.duma...@gmail.com
Date: Wed, 14 May 2014 07:23:52 -0700
On Wed, 2014-05-14 at 14:40 +0100, Zoltan Kiss wrote:
Hi,
Recently I've investigated issues around SKBTX_DEV_ZEROCOPY skbs where
the frags list were modified. I came across this function skb_shift(),
which
On Wed, 2014-05-14 at 13:42 -0400, David Miller wrote:
From: Eric Dumazet eric.duma...@gmail.com
Date: Wed, 14 May 2014 07:23:52 -0700
On Wed, 2014-05-14 at 14:40 +0100, Zoltan Kiss wrote:
Hi,
Recently I've investigated issues around SKBTX_DEV_ZEROCOPY skbs where
the frags list
2014-05-14 19:00+0200, Peter Zijlstra:
On Wed, May 14, 2014 at 06:51:24PM +0200, Radim Krčmář wrote:
Ok.
I've seen merit in pvqspinlock even with slightly slower first-waiter,
so I would have happily sacrificed those horrible branches.
(I prefer elegant to optimized code, but I can see
On 14/05/14 15:23, Eric Dumazet wrote:
On Wed, 2014-05-14 at 14:40 +0100, Zoltan Kiss wrote:
Hi,
Recently I've investigated issues around SKBTX_DEV_ZEROCOPY skbs where
the frags list were modified. I came across this function skb_shift(),
which moves frags between skbs. And there are a lot
On Wed, 2014-05-14 at 20:41 +0100, Zoltan Kiss wrote:
On 14/05/14 15:23, Eric Dumazet wrote:
On Wed, 2014-05-14 at 14:40 +0100, Zoltan Kiss wrote:
Hi,
Recently I've investigated issues around SKBTX_DEV_ZEROCOPY skbs where
the frags list were modified. I came across this function
On 05/14/2014 09:47 AM, Christoffer Dall wrote:
On Wed, May 07, 2014 at 05:40:13PM -0700, Mario Smarduch wrote:
Patch adds HYP interface for global VM TLB invalidation without address
parameter.
- Added ARM version of kvm_flush_remote_tlbs()
Signed-off-by: Mario Smarduch
Try TSO offload on Guest Virtio interface
And try passthrough interface mode at Host Level for this Guest Virtio Interface
Thanks,
Venkatesh
-Original Message-
From: kvm-ow...@vger.kernel.org [mailto:kvm-ow...@vger.kernel.org] On Behalf Of
JR
Sent: Wednesday, May 14, 2014 9:07 PM
To:
On Fri, May 9, 2014 at 6:15 PM, Eric Auger eric.au...@linaro.org wrote:
This patch enables irqfd and irq routing on ARM.
It turns on CONFIG_HAVE_KVM_EVENTFD and CONFIG_HAVE_KVM_IRQ_ROUTING
irqfd framework enables to assign physical IRQs to guests.
1) user-side uses KVM_IRQFD VM ioctl to
Hi Jan and there,
I want to disable IDE BMDMA in Qemu/KVM and let guest OS uses only PIO
mode. Are there any configurations in Qemu or KVM to disable the
hardware support of DMA?
I have tried to disable IDE DMA in guest OS booting params as follows:
ide-core.nodma=0.0 libata.dma=0 ide=nodma
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