On 01/18/2012 12:27 AM, Raghavendra K T wrote:
On 01/17/2012 04:32 PM, Marcelo Tosatti wrote:
On Sat, Jan 14, 2012 at 11:56:46PM +0530, Raghavendra K T wrote:
[...]
+ || (vcpu->requests& ~(1UL
On 01/24/2012 07:38 PM, Avi Kivity wrote:
On 01/18/2012 11:52 PM, Jeremy Fitzhardinge wrote:
On 01/19/2012 12:54 AM, Srivatsa Vaddagiri wrote:
That logic relies on the "kick" being level triggered, so that "kick"
before "block" will cause the block to fall out immediately. If you're
using "h
On 01/18/2012 11:52 PM, Jeremy Fitzhardinge wrote:
> On 01/19/2012 12:54 AM, Srivatsa Vaddagiri wrote:
> >
> >> That logic relies on the "kick" being level triggered, so that "kick"
> >> before "block" will cause the block to fall out immediately. If you're
> >> using "hlt" as the block and it has
On 01/19/2012 12:54 AM, Srivatsa Vaddagiri wrote:
>
>> That logic relies on the "kick" being level triggered, so that "kick"
>> before "block" will cause the block to fall out immediately. If you're
>> using "hlt" as the block and it has the usual edge-triggered behaviour,
>> what stops a "kick-be
* Jeremy Fitzhardinge [2012-01-18 12:34:42]:
> >> What prevents a kick from being lost here, if say, the waiter is at
> >> local_irq_save in kvm_lock_spinning, before the lock/want assignments?
> > The waiter does check for lock becoming available before actually
> > sleeping:
> >
> > + /*
> >
On 01/17/2012 10:33 PM, Srivatsa Vaddagiri wrote:
> * Marcelo Tosatti [2012-01-17 09:02:11]:
>
>>> +/* Kick vcpu waiting on @lock->head to reach value @ticket */
>>> +static void kvm_unlock_kick(struct arch_spinlock *lock, __ticket_t ticket)
>>> +{
>>> + int cpu;
>>> + int apicid;
>>> +
>>> +
On 01/17/2012 04:32 PM, Marcelo Tosatti wrote:
On Sat, Jan 14, 2012 at 11:56:46PM +0530, Raghavendra K T wrote:
Extends Linux guest running on KVM hypervisor to support pv-ticketlocks.
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index c7b05fc..4d7a950 100644
--- a/arch/x86/kvm/x86.c
+++
* Marcelo Tosatti [2012-01-17 09:02:11]:
> > +/* Kick vcpu waiting on @lock->head to reach value @ticket */
> > +static void kvm_unlock_kick(struct arch_spinlock *lock, __ticket_t ticket)
> > +{
> > + int cpu;
> > + int apicid;
> > +
> > + add_stats(RELEASED_SLOW, 1);
> > +
> > + for_each
On Sat, Jan 14, 2012 at 11:56:46PM +0530, Raghavendra K T wrote:
> Extends Linux guest running on KVM hypervisor to support pv-ticketlocks.
>
> During smp_boot_cpus paravirtualied KVM guest detects if the hypervisor has
> required feature (KVM_FEATURE_PVLOCK_KICK) to support pv-ticketlocks. If s
On 01/17/2012 01:47 AM, Avi Kivity wrote:
> On 01/16/2012 04:13 PM, Raghavendra K T wrote:
>>> Please drop all of these and replace with tracepoints in the appropriate
>>> spots. Everything else (including the historgram) can be reconstructed
>>> the tracepoints in userspace.
>>>
>>
>> I think Jer
On 01/16/2012 04:13 PM, Raghavendra K T wrote:
>> Please drop all of these and replace with tracepoints in the appropriate
>> spots. Everything else (including the historgram) can be reconstructed
>> the tracepoints in userspace.
>>
>
>
> I think Jeremy pointed that tracepoints use spinlocks and h
On 01/16/2012 02:35 PM, Avi Kivity wrote:
On 01/14/2012 08:26 PM, Raghavendra K T wrote:
Extends Linux guest running on KVM hypervisor to support pv-ticketlocks.
During smp_boot_cpus paravirtualied KVM guest detects if the hypervisor has
required feature (KVM_FEATURE_PVLOCK_KICK) to support pv
On 01/14/2012 08:26 PM, Raghavendra K T wrote:
> Extends Linux guest running on KVM hypervisor to support pv-ticketlocks.
>
> During smp_boot_cpus paravirtualied KVM guest detects if the hypervisor has
> required feature (KVM_FEATURE_PVLOCK_KICK) to support pv-ticketlocks. If so,
> support for p
On 01/16/2012 08:42 AM, Alexander Graf wrote:
On 14.01.2012, at 19:26, Raghavendra K T wrote:
Extends Linux guest running on KVM hypervisor to support pv-ticketlocks.
During smp_boot_cpus paravirtualied KVM guest detects if the hypervisor has
required feature (KVM_FEATURE_PVLOCK_KICK) to sup
On 14.01.2012, at 19:26, Raghavendra K T wrote:
> Extends Linux guest running on KVM hypervisor to support pv-ticketlocks.
>
> During smp_boot_cpus paravirtualied KVM guest detects if the hypervisor has
> required feature (KVM_FEATURE_PVLOCK_KICK) to support pv-ticketlocks. If so,
> support fo
Extends Linux guest running on KVM hypervisor to support pv-ticketlocks.
During smp_boot_cpus paravirtualied KVM guest detects if the hypervisor has
required feature (KVM_FEATURE_PVLOCK_KICK) to support pv-ticketlocks. If so,
support for pv-ticketlocks is registered via pv_lock_ops.
Use KVM_HC
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