Displaying 3 results from an estimated 3 matches for "c3b4b43".
2015 Apr 30
0
[PATCH 3/6] x86: introduce new pvops function clear_slowpath
...ontenders */
- cmpxchg(&lock->head_tail, old.head_tail, new.head_tail);
-}
-
static __always_inline int arch_spin_value_unlocked(arch_spinlock_t lock)
{
return __tickets_equal(lock.tickets.head, lock.tickets.tail);
diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index 9435620..c3b4b43 100644
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -830,6 +830,8 @@ void __init kvm_spinlock_init(void)
pv_lock_ops.lock_spinning = PV_CALLEE_SAVE(kvm_lock_spinning);
pv_lock_ops.unlock_kick = kvm_unlock_kick;
+
+ pv_lock_activate();
}
static __init int kvm_spinlock_init_ju...
2015 Apr 30
12
[PATCH 0/6] x86: reduce paravirtualized spinlock overhead
Paravirtualized spinlocks produce some overhead even if the kernel is
running on bare metal. The main reason are the more complex locking
and unlocking functions. Especially unlocking is no longer just one
instruction but so complex that it is no longer inlined.
This patch series addresses this issue by adding two more pvops
functions to reduce the size of the inlined spinlock functions. When
2015 Apr 30
12
[PATCH 0/6] x86: reduce paravirtualized spinlock overhead
Paravirtualized spinlocks produce some overhead even if the kernel is
running on bare metal. The main reason are the more complex locking
and unlocking functions. Especially unlocking is no longer just one
instruction but so complex that it is no longer inlined.
This patch series addresses this issue by adding two more pvops
functions to reduce the size of the inlined spinlock functions. When