Displaying 9 results from an estimated 9 matches for "xen_unfair_locks_init_jump".
2014 Mar 19
1
[PATCH v7 07/11] pvqspinlock, x86: Allow unfair queue spinlock in a XEN guest
...arch/x86/xen/setup.c
> +++ b/arch/x86/xen/setup.c
> @@ -625,3 +625,22 @@ void __init xen_arch_setup(void)
> numa_off = 1;
> #endif
> }
> +
> +#ifdef CONFIG_PARAVIRT_UNFAIR_LOCKS
> +/*
> + * Enable unfair lock if running in a Xen guest
> + */
> +static __init int xen_unfair_locks_init_jump(void)
> +{
> + /*
> + * Disable unfair lock if not running in a PV domain
> + */
> + if (!xen_pv_domain())
> + return 0;
I would just make this 'xen_domain'. Not sure why you need
to have it only for PV while the PVHVM guests can also use it?
Would it also make sense...
2014 Mar 19
1
[PATCH v7 07/11] pvqspinlock, x86: Allow unfair queue spinlock in a XEN guest
...arch/x86/xen/setup.c
> +++ b/arch/x86/xen/setup.c
> @@ -625,3 +625,22 @@ void __init xen_arch_setup(void)
> numa_off = 1;
> #endif
> }
> +
> +#ifdef CONFIG_PARAVIRT_UNFAIR_LOCKS
> +/*
> + * Enable unfair lock if running in a Xen guest
> + */
> +static __init int xen_unfair_locks_init_jump(void)
> +{
> + /*
> + * Disable unfair lock if not running in a PV domain
> + */
> + if (!xen_pv_domain())
> + return 0;
I would just make this 'xen_domain'. Not sure why you need
to have it only for PV while the PVHVM guests can also use it?
Would it also make sense...
2014 Mar 19
0
[PATCH v7 07/11] pvqspinlock, x86: Allow unfair queue spinlock in a XEN guest
...ch/x86/xen/setup.c
index 0982233..66bb6f5 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -625,3 +625,22 @@ void __init xen_arch_setup(void)
numa_off = 1;
#endif
}
+
+#ifdef CONFIG_PARAVIRT_UNFAIR_LOCKS
+/*
+ * Enable unfair lock if running in a Xen guest
+ */
+static __init int xen_unfair_locks_init_jump(void)
+{
+ /*
+ * Disable unfair lock if not running in a PV domain
+ */
+ if (!xen_pv_domain())
+ return 0;
+
+ static_key_slow_inc(¶virt_unfairlocks_enabled);
+
+ return 0;
+}
+early_initcall(xen_unfair_locks_init_jump);
+#endif
--
1.7.1
2014 Mar 21
0
[PATCH v7 07/11] pvqspinlock, x86: Allow unfair queue spinlock in a XEN guest
...en_arch_setup(void)
> >>?? numa_off = 1;
> >>?? #endif
> >>?? }
> >> +
> >> +#ifdef CONFIG_PARAVIRT_UNFAIR_LOCKS
> >> +/*
> >> + * Enable unfair lock if running in a Xen guest
> >> + */
> >> +static __init int xen_unfair_locks_init_jump(void)
> >> +{
> >> + /*
> >> + * Disable unfair lock if not running in a PV domain
> >> + */
> >> + if (!xen_pv_domain())
> >> + return 0;
> > I would just make this 'xen_domain'. Not sure why you need
> > to have it...
2014 Mar 21
0
[PATCH v7 07/11] pvqspinlock, x86: Allow unfair queue spinlock in a XEN guest
...en_arch_setup(void)
> >>?? numa_off = 1;
> >>?? #endif
> >>?? }
> >> +
> >> +#ifdef CONFIG_PARAVIRT_UNFAIR_LOCKS
> >> +/*
> >> + * Enable unfair lock if running in a Xen guest
> >> + */
> >> +static __init int xen_unfair_locks_init_jump(void)
> >> +{
> >> + /*
> >> + * Disable unfair lock if not running in a PV domain
> >> + */
> >> + if (!xen_pv_domain())
> >> + return 0;
> > I would just make this 'xen_domain'. Not sure why you need
> > to have it...
2014 Mar 19
15
[PATCH v7 00/11] qspinlock: a 4-byte queue spinlock with PV support
v6->v7:
- Remove an atomic operation from the 2-task contending code
- Shorten the names of some macros
- Make the queue waiter to attempt to steal lock when unfair lock is
enabled.
- Remove lock holder kick from the PV code and fix a race condition
- Run the unfair lock & PV code on overcommitted KVM guests to collect
performance data.
v5->v6:
- Change the optimized
2014 Mar 19
15
[PATCH v7 00/11] qspinlock: a 4-byte queue spinlock with PV support
v6->v7:
- Remove an atomic operation from the 2-task contending code
- Shorten the names of some macros
- Make the queue waiter to attempt to steal lock when unfair lock is
enabled.
- Remove lock holder kick from the PV code and fix a race condition
- Run the unfair lock & PV code on overcommitted KVM guests to collect
performance data.
v5->v6:
- Change the optimized
2014 Mar 12
17
[PATCH v6 00/11] qspinlock: a 4-byte queue spinlock with PV support
v5->v6:
- Change the optimized 2-task contending code to make it fairer at the
expense of a bit of performance.
- Add a patch to support unfair queue spinlock for Xen.
- Modify the PV qspinlock code to follow what was done in the PV
ticketlock.
- Add performance data for the unfair lock as well as the PV
support code.
v4->v5:
- Move the optimized 2-task contending code to the
2014 Mar 12
17
[PATCH v6 00/11] qspinlock: a 4-byte queue spinlock with PV support
v5->v6:
- Change the optimized 2-task contending code to make it fairer at the
expense of a bit of performance.
- Add a patch to support unfair queue spinlock for Xen.
- Modify the PV qspinlock code to follow what was done in the PV
ticketlock.
- Add performance data for the unfair lock as well as the PV
support code.
v4->v5:
- Move the optimized 2-task contending code to the