Zhang, Xiantao wrote:
Hi, Jes
Currently, we only supports up to 8 vcpus, and to be safe, I set
the limit to 4 (Defined in include/asm/kvm_host.h). Maybe you can
increase the macro KVM_MAX_VCPUS to have a try. In order to support >8
vcpus, we can decrease the size of vtlb and vhpt, also defined in
include/asm/kvm_host.h. Thanks! :0
Xiantao
Hi,
I am seeing something interesting here, but it could be a fluke:
I added this printk to my code:
void leave_hypervisor_tail(void)
{
struct kvm_vcpu *v = current_vcpu;
if (VMX(v, timer_check)) {
VMX(v, timer_check) = 0;
if (VMX(v, itc_check)) {
if (vcpu_get_itc(v) > VCPU(v, itm)) {
if (v->vcpu_id > 1)
printk("vcpu %i irq check\n", v->vcpu_id);
Now I am seeing this in my syslog:
Oct 10 07:21:34 a4700rac kernel: vcpu 5 irq check
Oct 10 07:21:34 a4700rac kernel: vcpu 3 irq check
Oct 10 07:21:34 a4700rac kernel: vcpu 2 irq check
Oct 10 07:21:34 a4700rac kernel: vcpu 5 irq check
Oct 10 07:21:34 a4700rac kernel: vcpu 3 irq check
Oct 10 07:21:34 a4700rac kernel: vcpu 2 irq check
Oct 10 07:21:34 a4700rac kernel: vcpu 5 irq check
Oct 10 07:21:34 a4700rac kernel: vcpu 3 irq check
Oct 10 07:21:34 a4700rac kernel: vcpu 2 irq check
Oct 10 07:21:34 a4700rac kernel: vcpu 5 irq check
Oct 10 07:21:34 a4700rac kernel: vcpu 3 irq check
Oct 10 07:21:34 a4700rac kernel: vcpu 2 irq check
Oct 10 07:21:34 a4700rac kernel: vcpu 5 irq check
Oct 10 07:21:34 a4700rac kernel: vcpu 3 irq check
Note that I never seem to see irq checks for cpus 4, 6, 7 ..... maybe
syslog is chewing them up though, but it seems strange that they never
seem to appear.
This is when I boot with 8 vcpus.
Cheers,
Jes
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