There are two new kernel parameters for changing the halt_poll_ns:
halt_poll_ns_grow and halt_poll_ns_shrink. halt_poll_ns_grow affects
halt_poll_ns when an interrupt arrives and halt_poll_ns_shrink
does it when idle VCPU is detected.
halt_poll_ns_shrink/ |
halt_poll_ns_grow| interrupt
There is a downside of halt_poll_ns since poll is still happen for idle
VCPU which can waste cpu usage. This patchset add the ability to adjust
halt_poll_ns dynamically, grows halt_poll_ns if an interrupt arrives and
shrinks halt_poll_ns when idle VCPU is detected.
There are two new kernel
Tracepoint for dynamic halt_pool_ns, fired on every potential change.
Signed-off-by: Wanpeng Li wanpeng...@hotmail.com
---
include/trace/events/kvm.h | 30 ++
virt/kvm/kvm_main.c| 8
2 files changed, 38 insertions(+)
diff --git
Change halt_poll_ns into per-VCPU variable, seeded from module parameter,
to allow greater flexibility.
Signed-off-by: Wanpeng Li wanpeng...@hotmail.com
---
include/linux/kvm_host.h | 1 +
virt/kvm/kvm_main.c | 1 +
2 files changed, 2 insertions(+)
diff --git a/include/linux/kvm_host.h
On Mon, 24 Aug 2015 11:29:29 +0800
Jason Wang jasow...@redhat.com wrote:
On 08/21/2015 05:29 PM, Cornelia Huck wrote:
On Fri, 21 Aug 2015 16:03:52 +0800
Jason Wang jasow...@redhat.com wrote:
@@ -850,9 +845,15 @@ kvm_assign_ioeventfd(struct kvm *kvm, struct
kvm_ioeventfd *args)
On 24-8-2015 1:26, Wanpeng Li wrote:
On 8/24/15 3:18 AM, Hansa wrote:
On 16-7-2015 13:27, Paolo Bonzini wrote:
On 15/07/2015 22:02, C. Bröcker wrote:
What OS is this? Is it RHEL/CentOS? If so, halt_poll_ns will be in 6.7
which will be out in a few days/weeks.
Paolo
OK. As said CentOS 6.6.
Hi,
On 03/08/15 18:06, Marc Zyngier wrote:
On 03/08/15 16:37, Eric Auger wrote:
Andre, Pavel,
On 08/03/2015 11:16 AM, Pavel Fedin wrote:
Hello!
Again the case that leaves me uncomfortable is the one where the
userspace does not provide the devid whereas it must (GICv3 ITS case).
To whom it may concern:
I'm trying to make an edit to this page:
http://www.linux-kvm.org/index.php?title=Windows7Install
I have successfully created an account. When I Save the edit to the
page, it looks like everything worked okay. However, when I refresh
the page, my edit is gone, and no
https://bugzilla.kernel.org/show_bug.cgi?id=103141
--- Comment #2 from felix felix.vo...@posteo.de ---
Created attachment 185681
-- https://bugzilla.kernel.org/attachment.cgi?id=185681action=edit
Test program 2 (C99)
You mean can as in I think it does or it did for me?
And anyway, it seems to
https://bugzilla.kernel.org/show_bug.cgi?id=103141
felix felix.vo...@posteo.de changed:
What|Removed |Added
Attachment #185681|0 |1
is obsolete|
Hi Eric,
On 12/08/15 10:01, Eric Auger wrote:
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c
index bc40137..394622c 100644
--- a/virt/kvm/arm/vgic.c
+++ b/virt/kvm/arm/vgic.c
@@ -79,7 +79,6 @@
#include vgic.h
static void vgic_retire_disabled_irqs(struct kvm_vcpu *vcpu);
On Mon, Aug 24, 2015 at 5:53 AM, Wanpeng Li wanpeng...@hotmail.com wrote:
Change halt_poll_ns into per-VCPU variable, seeded from module parameter,
to allow greater flexibility.
You should also change kvm_vcpu_block to read halt_poll_ns from
the vcpu instead of the module parameter.
On Mon, Aug 24, 2015 at 5:53 AM, Wanpeng Li wanpeng...@hotmail.com wrote:
There are two new kernel parameters for changing the halt_poll_ns:
halt_poll_ns_grow and halt_poll_ns_shrink. halt_poll_ns_grow affects
halt_poll_ns when an interrupt arrives and halt_poll_ns_shrink
does it when idle
Hi,
On 12/08/15 14:02, Eric Auger wrote:
On 07/10/2015 04:21 PM, Andre Przywara wrote:
Currently we initialize all the possible GIC frame addresses in one
function, without looking at the specific GIC model we instantiate
for the guest.
As this gets confusing when adding another VGIC model
Hi Eric,
On 13/08/15 13:17, Eric Auger wrote:
On 07/10/2015 04:21 PM, Andre Przywara wrote:
In the GICv3 redistributor there are the PENDBASER and PROPBASER
registers which we did not emulate so far, as they only make sense
when having an ITS. In preparation for that emulate those MMIO
On Mon, Aug 24, 2015 at 10:34 AM, Geert Uytterhoeven
ge...@linux-m68k.org wrote:
JFYI, when comparing v4.2-rc8[1] to v4.2-rc7[3], the summaries are:
- build errors: +4/-7
4 regressions:
+ /home/kisskb/slave/src/include/linux/kvm_host.h: error: array
subscript is above array bounds
On 24/08/2015 06:49, Alexander Graf wrote:
Hi Paolo,
This is my current patch queue for ppc. Please pull.
Done, but this queue has not been in linux-next. Please push to
kvm-ppc-next on your github Linux tree as well; please keep an eye on
Ah, sorry. I pushed to kvm-ppc-next
On 24/08/2015 06:49, Alexander Graf wrote:
Hi Paolo,
This is my current patch queue for ppc. Please pull.
Done, but this queue has not been in linux-next. Please push to
kvm-ppc-next on your github Linux tree as well; please keep an eye on
Ah, sorry. I pushed to kvm-ppc-next
Peter Hornyack peterhorny...@google.com writes:
Set the vm's unhandled_msr_exits flag when user space calls the
KVM_ENABLE_CAP ioctl with KVM_CAP_UNHANDLED_MSR_EXITS. After kvm fails
to handle a guest rdmsr or wrmsr, check this flag and exit to user space
with KVM_EXIT_MSR rather than
Peter Hornyack peterhorny...@google.com writes:
msr_exits_supported will be checked when user space attempts to enable
the KVM_CAP_UNHANDLED_MSR_EXITS capability for the vm. This is needed
because MSR exit support will be implemented for vmx but not svm later
in this patchset.
Is svm future
Please try this:
Still no difference
I guess the trace_kvm_cr_write() call in that patch was supposed to
trigger kvm_cr entries while tracing? I couldn't find any, though, the
only entries containing cr within the output of trace-cmd report
were kvm_exit ones that looked quite similar to the
Peter Hornyack peterhorny...@google.com writes:
On Wed, Aug 19, 2015 at 2:43 PM, Bandan Das b...@redhat.com wrote:
Peter Hornyack peterhorny...@google.com writes:
There are numerous MSRs that kvm does not currently handle. On Intel
platforms we have observed guest VMs accessing some of these
Hi David，
On 8/25/15 1:00 AM, David Matlack wrote:
On Mon, Aug 24, 2015 at 5:53 AM, Wanpeng Li wanpeng...@hotmail.com wrote:
There are two new kernel parameters for changing the halt_poll_ns:
halt_poll_ns_grow and halt_poll_ns_shrink. halt_poll_ns_grow affects
halt_poll_ns when an interrupt
On 8/25/15 12:59 AM, David Matlack wrote:
On Mon, Aug 24, 2015 at 5:53 AM, Wanpeng Li wanpeng...@hotmail.com wrote:
Change halt_poll_ns into per-VCPU variable, seeded from module parameter,
to allow greater flexibility.
You should also change kvm_vcpu_block to read halt_poll_ns from
the vcpu
On 08/24/2015 10:05 PM, Cornelia Huck wrote:
On Mon, 24 Aug 2015 11:29:29 +0800
Jason Wang jasow...@redhat.com wrote:
On 08/21/2015 05:29 PM, Cornelia Huck wrote:
On Fri, 21 Aug 2015 16:03:52 +0800
Jason Wang jasow...@redhat.com wrote:
@@ -850,9 +845,15 @@ kvm_assign_ioeventfd(struct kvm
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