Displaying 7 results from an estimated 7 matches for "838d235b87ef".
2017 Sep 06
4
[PATCH v2 0/2] guard virt_spin_lock() with a static key
With virt_spin_lock() being guarded by a static key 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.
V2:
- use static key instead of making virt_spin_lock() a pvops function
Juergen Gross
2017 Sep 06
4
[PATCH v2 0/2] guard virt_spin_lock() with a static key
With virt_spin_lock() being guarded by a static key 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.
V2:
- use static key instead of making virt_spin_lock() a pvops function
Juergen Gross
2017 Sep 06
0
[PATCH v2 1/2] paravirt/locks: use new static key for controlling call of virt_spin_lock()
...lready set me in cpu_online_mask in boot_cpu_init() */
cpumask_set_cpu(me, cpu_callout_mask);
cpu_set_state_online(me);
+ native_pv_lock_init();
}
void __init native_smp_cpus_done(unsigned int max_cpus)
diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c
index 294294c71ba4..838d235b87ef 100644
--- a/kernel/locking/qspinlock.c
+++ b/kernel/locking/qspinlock.c
@@ -76,6 +76,10 @@
#define MAX_NODES 4
#endif
+#ifdef CONFIG_PARAVIRT
+DEFINE_STATIC_KEY_TRUE(virt_spin_lock_key);
+#endif
+
/*
* Per-CPU queue node structures; we can never have more than 4 nested
* contexts: task, s...
2017 Sep 06
2
[PATCH v2 1/2] paravirt/locks: use new static key for controlling call of virt_spin_lock()
..._cpu_init() */
> cpumask_set_cpu(me, cpu_callout_mask);
> cpu_set_state_online(me);
> + native_pv_lock_init();
> }
>
> void __init native_smp_cpus_done(unsigned int max_cpus)
> diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c
> index 294294c71ba4..838d235b87ef 100644
> --- a/kernel/locking/qspinlock.c
> +++ b/kernel/locking/qspinlock.c
> @@ -76,6 +76,10 @@
> #define MAX_NODES 4
> #endif
>
> +#ifdef CONFIG_PARAVIRT
> +DEFINE_STATIC_KEY_TRUE(virt_spin_lock_key);
> +#endif
> +
> /*
> * Per-CPU queue node structures...
2017 Sep 06
2
[PATCH v2 1/2] paravirt/locks: use new static key for controlling call of virt_spin_lock()
..._cpu_init() */
> cpumask_set_cpu(me, cpu_callout_mask);
> cpu_set_state_online(me);
> + native_pv_lock_init();
> }
>
> void __init native_smp_cpus_done(unsigned int max_cpus)
> diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c
> index 294294c71ba4..838d235b87ef 100644
> --- a/kernel/locking/qspinlock.c
> +++ b/kernel/locking/qspinlock.c
> @@ -76,6 +76,10 @@
> #define MAX_NODES 4
> #endif
>
> +#ifdef CONFIG_PARAVIRT
> +DEFINE_STATIC_KEY_TRUE(virt_spin_lock_key);
> +#endif
> +
> /*
> * Per-CPU queue node structures...
2017 Sep 06
5
[PATCH v3 0/2] guard virt_spin_lock() with a static key
With virt_spin_lock() being guarded by a static key 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.
V3:
- remove test for hypervisor environment from virt_spin_lock(9 as
suggested by
2017 Sep 06
5
[PATCH v3 0/2] guard virt_spin_lock() with a static key
With virt_spin_lock() being guarded by a static key 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.
V3:
- remove test for hypervisor environment from virt_spin_lock(9 as
suggested by