Displaying 8 results from an estimated 8 matches for "__native_virt_spin_lock".
2017 Sep 05
2
[PATCH 3/4] paravirt: add virt_spin_lock pvops function
...locks.c
> index 26e4bd92f309..1be187ef8a38 100644
> --- a/arch/x86/kernel/paravirt-spinlocks.c
> +++ b/arch/x86/kernel/paravirt-spinlocks.c
> @@ -20,6 +20,12 @@ bool pv_is_native_spin_unlock(void)
> __raw_callee_save___native_queued_spin_unlock;
> }
>
> +__visible bool __native_virt_spin_lock(struct qspinlock *lock)
> +{
> + return native_virt_spin_lock(lock);
> +}
> +PV_CALLEE_SAVE_REGS_THUNK(__native_virt_spin_lock);
I have some concern about the overhead of register saving/restoring have
on spin lock performance in case the kernel is under a non-KVM/Xen
hypervisor.
Chee...
2017 Sep 05
2
[PATCH 3/4] paravirt: add virt_spin_lock pvops function
...locks.c
> index 26e4bd92f309..1be187ef8a38 100644
> --- a/arch/x86/kernel/paravirt-spinlocks.c
> +++ b/arch/x86/kernel/paravirt-spinlocks.c
> @@ -20,6 +20,12 @@ bool pv_is_native_spin_unlock(void)
> __raw_callee_save___native_queued_spin_unlock;
> }
>
> +__visible bool __native_virt_spin_lock(struct qspinlock *lock)
> +{
> + return native_virt_spin_lock(lock);
> +}
> +PV_CALLEE_SAVE_REGS_THUNK(__native_virt_spin_lock);
I have some concern about the overhead of register saving/restoring have
on spin lock performance in case the kernel is under a non-KVM/Xen
hypervisor.
Chee...
2017 Sep 05
0
[PATCH 3/4] paravirt: add virt_spin_lock pvops function
...nlocks.c b/arch/x86/kernel/paravirt-spinlocks.c
index 26e4bd92f309..1be187ef8a38 100644
--- a/arch/x86/kernel/paravirt-spinlocks.c
+++ b/arch/x86/kernel/paravirt-spinlocks.c
@@ -20,6 +20,12 @@ bool pv_is_native_spin_unlock(void)
__raw_callee_save___native_queued_spin_unlock;
}
+__visible bool __native_virt_spin_lock(struct qspinlock *lock)
+{
+ return native_virt_spin_lock(lock);
+}
+PV_CALLEE_SAVE_REGS_THUNK(__native_virt_spin_lock);
+
struct pv_lock_ops pv_lock_ops = {
#ifdef CONFIG_SMP
.queued_spin_lock_slowpath = native_queued_spin_lock_slowpath,
@@ -27,6 +33,14 @@ struct pv_lock_ops pv_lock_ops = {...
2017 Sep 05
0
[PATCH 3/4] paravirt: add virt_spin_lock pvops function
...309..1be187ef8a38 100644
>> --- a/arch/x86/kernel/paravirt-spinlocks.c
>> +++ b/arch/x86/kernel/paravirt-spinlocks.c
>> @@ -20,6 +20,12 @@ bool pv_is_native_spin_unlock(void)
>> __raw_callee_save___native_queued_spin_unlock;
>> }
>>
>> +__visible bool __native_virt_spin_lock(struct qspinlock *lock)
>> +{
>> + return native_virt_spin_lock(lock);
>> +}
>> +PV_CALLEE_SAVE_REGS_THUNK(__native_virt_spin_lock);
>
> I have some concern about the overhead of register saving/restoring have
> on spin lock performance in case the kernel is under...
2017 Sep 05
7
[PATCH 0/4] make virt_spin_lock() a pvops function
With virt_spin_lock() being a pvops function the bare metal case can be
optimized by patching the call away completely. In case a kernel running
as a guest it can decide whether to use paravitualized spinlocks, the
current fallback to the unfair test-and-set scheme, or to mimic the
bare metal behavior.
Juergen Gross (4):
paravirt: add generic _paravirt_false() function
paravirt: switch
2017 Sep 05
7
[PATCH 0/4] make virt_spin_lock() a pvops function
With virt_spin_lock() being a pvops function the bare metal case can be
optimized by patching the call away completely. In case a kernel running
as a guest it can decide whether to use paravitualized spinlocks, the
current fallback to the unfair test-and-set scheme, or to mimic the
bare metal behavior.
Juergen Gross (4):
paravirt: add generic _paravirt_false() function
paravirt: switch
2017 Sep 05
3
[PATCH 3/4] paravirt: add virt_spin_lock pvops function
...;>> --- a/arch/x86/kernel/paravirt-spinlocks.c
>>> +++ b/arch/x86/kernel/paravirt-spinlocks.c
>>> @@ -20,6 +20,12 @@ bool pv_is_native_spin_unlock(void)
>>> __raw_callee_save___native_queued_spin_unlock;
>>> }
>>>
>>> +__visible bool __native_virt_spin_lock(struct qspinlock *lock)
>>> +{
>>> + return native_virt_spin_lock(lock);
>>> +}
>>> +PV_CALLEE_SAVE_REGS_THUNK(__native_virt_spin_lock);
>> I have some concern about the overhead of register saving/restoring have
>> on spin lock performance in case th...
2017 Sep 05
3
[PATCH 3/4] paravirt: add virt_spin_lock pvops function
...;>> --- a/arch/x86/kernel/paravirt-spinlocks.c
>>> +++ b/arch/x86/kernel/paravirt-spinlocks.c
>>> @@ -20,6 +20,12 @@ bool pv_is_native_spin_unlock(void)
>>> __raw_callee_save___native_queued_spin_unlock;
>>> }
>>>
>>> +__visible bool __native_virt_spin_lock(struct qspinlock *lock)
>>> +{
>>> + return native_virt_spin_lock(lock);
>>> +}
>>> +PV_CALLEE_SAVE_REGS_THUNK(__native_virt_spin_lock);
>> I have some concern about the overhead of register saving/restoring have
>> on spin lock performance in case th...