search for: kvm_kick_cpu_typ

Displaying 20 results from an estimated 20 matches for "kvm_kick_cpu_typ".

Did you mean: kvm_kick_cpu_type
2014 Mar 13
2
[PATCH RFC v6 10/11] pvqspinlock, x86: Enable qspinlock PV support for KVM
Il 12/03/2014 19:54, Waiman Long ha scritto: > @@ -807,8 +889,13 @@ void __init kvm_spinlock_init(void) > if (!kvm_para_has_feature(KVM_FEATURE_PV_UNHALT)) > return; > > +#ifdef CONFIG_QUEUE_SPINLOCK > + pv_lock_ops.kick_cpu = kvm_kick_cpu_type; > + pv_lock_ops.hibernate = kvm_hibernate; > +#else > pv_lock_ops.lock_spinning = PV_CALLEE_SAVE(kvm_lock_spinning); > pv_lock_ops.unlock_kick = kvm_unlock_kick; > +#endif This should also disable the unfair path. Paolo
2014 Mar 13
2
[PATCH RFC v6 10/11] pvqspinlock, x86: Enable qspinlock PV support for KVM
Il 12/03/2014 19:54, Waiman Long ha scritto: > @@ -807,8 +889,13 @@ void __init kvm_spinlock_init(void) > if (!kvm_para_has_feature(KVM_FEATURE_PV_UNHALT)) > return; > > +#ifdef CONFIG_QUEUE_SPINLOCK > + pv_lock_ops.kick_cpu = kvm_kick_cpu_type; > + pv_lock_ops.hibernate = kvm_hibernate; > +#else > pv_lock_ops.lock_spinning = PV_CALLEE_SAVE(kvm_lock_spinning); > pv_lock_ops.unlock_kick = kvm_unlock_kick; > +#endif This should also disable the unfair path. Paolo
2014 Feb 26
0
[PATCH RFC v5 8/8] pvqspinlock, x86: Enable KVM to use qspinlock's PV support
...se if (type == PV_KICK_QUEUE_HEAD) + add_smp(&qh_kick_stats, 1); + else + add_smp(&nn_kick_stats, 1); +} +fs_initcall(kvm_spinlock_debugfs); + +#else /* CONFIG_KVM_DEBUG_FS */ +static inline void inc_kick_stats(enum pv_kick_type type) +{ +} +#endif /* CONFIG_KVM_DEBUG_FS */ + +static void kvm_kick_cpu_type(int cpu, enum pv_kick_type type) +{ + kvm_kick_cpu(cpu); + inc_kick_stats(type); +} +#endif /* !CONFIG_QUEUE_SPINLOCK */ /* * Setup pv_lock_ops to exploit KVM_FEATURE_PV_UNHALT if present. @@ -807,8 +857,12 @@ void __init kvm_spinlock_init(void) if (!kvm_para_has_feature(KVM_FEATURE_PV_UNHA...
2014 Feb 27
1
[PATCH RFC v5 5/8] pvqspinlock, x86: Enable unfair queue spinlock in a KVM guest
...CONFIG_PARAVIRT_SPINLOCKS */ > + > +#ifdef CONFIG_PARAVIRT_UNFAIR_LOCKS > +/* > + * Enable unfair lock if running in a real para-virtualized environment > + */ > +static __init int kvm_unfair_locks_init_jump(void) > +{ > + if (!kvm_para_available()) > + return 0; > + kvm_kick_cpu_type() in patch 8 assumes that host has support for kick hypercall (KVM_HC_KICK_CPU). I think for that we need explicit check of this kvm_para_has_feature(KVM_FEATURE_PV_UNHALT). otherwise things may break for unlikely case of running a new guest on a old host? > + static_key_slow_inc(&para...
2014 Feb 27
1
[PATCH RFC v5 5/8] pvqspinlock, x86: Enable unfair queue spinlock in a KVM guest
...CONFIG_PARAVIRT_SPINLOCKS */ > + > +#ifdef CONFIG_PARAVIRT_UNFAIR_LOCKS > +/* > + * Enable unfair lock if running in a real para-virtualized environment > + */ > +static __init int kvm_unfair_locks_init_jump(void) > +{ > + if (!kvm_para_available()) > + return 0; > + kvm_kick_cpu_type() in patch 8 assumes that host has support for kick hypercall (KVM_HC_KICK_CPU). I think for that we need explicit check of this kvm_para_has_feature(KVM_FEATURE_PV_UNHALT). otherwise things may break for unlikely case of running a new guest on a old host? > + static_key_slow_inc(&para...
2014 Mar 12
0
[PATCH RFC v6 10/11] pvqspinlock, x86: Enable qspinlock PV support for KVM
...inc_hib_stats(void) +{ + add_smp(&hibernate_stats, 1); +} + +fs_initcall(kvm_spinlock_debugfs); + +#else /* CONFIG_KVM_DEBUG_FS */ +static inline void inc_kick_stats(enum pv_kick_type type) +{ +} + +static inline void inc_hib_stats(void) +{ + +} +#endif /* CONFIG_KVM_DEBUG_FS */ + +static void kvm_kick_cpu_type(int cpu, enum pv_kick_type type) +{ + kvm_kick_cpu(cpu); + inc_kick_stats(type); +} + +/* + * Halt the current CPU & release it back to the host + */ +static void kvm_hibernate(void) +{ + unsigned long flags; + + if (in_nmi()) + return; + + inc_hib_stats(); + /* + * Make sure an interrupt ha...
2014 Feb 27
1
[PATCH RFC v5 8/8] pvqspinlock, x86: Enable KVM to use qspinlock's PV support
...tats, 1); > + else > + add_smp(&nn_kick_stats, 1); > +} > +fs_initcall(kvm_spinlock_debugfs); > + > +#else /* CONFIG_KVM_DEBUG_FS */ > +static inline void inc_kick_stats(enum pv_kick_type type) > +{ > +} > +#endif /* CONFIG_KVM_DEBUG_FS */ > + > +static void kvm_kick_cpu_type(int cpu, enum pv_kick_type type) > +{ > + kvm_kick_cpu(cpu); > + inc_kick_stats(type); > +} > +#endif /* !CONFIG_QUEUE_SPINLOCK */ > > /* > * Setup pv_lock_ops to exploit KVM_FEATURE_PV_UNHALT if present. > @@ -807,8 +857,12 @@ void __init kvm_spinlock_init(void) &g...
2014 Feb 27
1
[PATCH RFC v5 8/8] pvqspinlock, x86: Enable KVM to use qspinlock's PV support
...tats, 1); > + else > + add_smp(&nn_kick_stats, 1); > +} > +fs_initcall(kvm_spinlock_debugfs); > + > +#else /* CONFIG_KVM_DEBUG_FS */ > +static inline void inc_kick_stats(enum pv_kick_type type) > +{ > +} > +#endif /* CONFIG_KVM_DEBUG_FS */ > + > +static void kvm_kick_cpu_type(int cpu, enum pv_kick_type type) > +{ > + kvm_kick_cpu(cpu); > + inc_kick_stats(type); > +} > +#endif /* !CONFIG_QUEUE_SPINLOCK */ > > /* > * Setup pv_lock_ops to exploit KVM_FEATURE_PV_UNHALT if present. > @@ -807,8 +857,12 @@ void __init kvm_spinlock_init(void) &g...
2014 Mar 19
0
[PATCH v7 10/11] pvqspinlock, x86: Enable qspinlock PV support for KVM
...static inline void inc_hib_stats(void) +{ + add_smp(&hibernate_stats, 1); +} + +fs_initcall(kvm_spinlock_debugfs); + +#else /* CONFIG_KVM_DEBUG_FS */ +static inline void inc_kick_stats(void) +{ +} + +static inline void inc_hib_stats(void) +{ + +} +#endif /* CONFIG_KVM_DEBUG_FS */ + +static void kvm_kick_cpu_type(int cpu) +{ + kvm_kick_cpu(cpu); + inc_kick_stats(); +} + +/* + * Halt the current CPU & release it back to the host + */ +static void kvm_hibernate(void) +{ + unsigned long flags; + + if (in_nmi()) + return; + + inc_hib_stats(); + /* + * Make sure an interrupt handler can't upset things...
2014 Mar 20
1
[PATCH v7 10/11] pvqspinlock, x86: Enable qspinlock PV support for KVM
...t; +} > + > +fs_initcall(kvm_spinlock_debugfs); > + > +#else /* CONFIG_KVM_DEBUG_FS */ > +static inline void inc_kick_stats(void) > +{ > +} > + > +static inline void inc_hib_stats(void) > +{ > + > +} > +#endif /* CONFIG_KVM_DEBUG_FS */ > + > +static void kvm_kick_cpu_type(int cpu) > +{ > + kvm_kick_cpu(cpu); > + inc_kick_stats(); > +} > + > +/* > + * Halt the current CPU & release it back to the host > + */ > +static void kvm_hibernate(void) > +{ > + unsigned long flags; > + > + if (in_nmi()) > + return; > + > +...
2014 Mar 20
1
[PATCH v7 10/11] pvqspinlock, x86: Enable qspinlock PV support for KVM
...t; +} > + > +fs_initcall(kvm_spinlock_debugfs); > + > +#else /* CONFIG_KVM_DEBUG_FS */ > +static inline void inc_kick_stats(void) > +{ > +} > + > +static inline void inc_hib_stats(void) > +{ > + > +} > +#endif /* CONFIG_KVM_DEBUG_FS */ > + > +static void kvm_kick_cpu_type(int cpu) > +{ > + kvm_kick_cpu(cpu); > + inc_kick_stats(); > +} > + > +/* > + * Halt the current CPU & release it back to the host > + */ > +static void kvm_hibernate(void) > +{ > + unsigned long flags; > + > + if (in_nmi()) > + return; > + > +...
2014 Mar 13
0
[PATCH RFC v6 10/11] pvqspinlock, x86: Enable qspinlock PV support for KVM
...i wrote: > Il 12/03/2014 19:54, Waiman Long ha scritto: >> @@ -807,8 +889,13 @@ void __init kvm_spinlock_init(void) >> if (!kvm_para_has_feature(KVM_FEATURE_PV_UNHALT)) >> return; >> >> +#ifdef CONFIG_QUEUE_SPINLOCK >> + pv_lock_ops.kick_cpu = kvm_kick_cpu_type; >> + pv_lock_ops.hibernate = kvm_hibernate; >> +#else >> pv_lock_ops.lock_spinning = PV_CALLEE_SAVE(kvm_lock_spinning); >> pv_lock_ops.unlock_kick = kvm_unlock_kick; >> +#endif > > This should also disable the unfair path. > > Paolo > The...
2014 Feb 26
22
[PATCH v5 0/8] qspinlock: a 4-byte queue spinlock with PV support
v4->v5: - Move the optimized 2-task contending code to the generic file to enable more architectures to use it without code duplication. - Address some of the style-related comments by PeterZ. - Allow the use of unfair queue spinlock in a real para-virtualized execution environment. - Add para-virtualization support to the qspinlock code by ensuring that the lock holder and queue
2014 Feb 26
22
[PATCH v5 0/8] qspinlock: a 4-byte queue spinlock with PV support
v4->v5: - Move the optimized 2-task contending code to the generic file to enable more architectures to use it without code duplication. - Address some of the style-related comments by PeterZ. - Allow the use of unfair queue spinlock in a real para-virtualized execution environment. - Add para-virtualization support to the qspinlock code by ensuring that the lock holder and queue
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
2014 Feb 27
14
[PATCH v5 0/8] qspinlock: a 4-byte queue spinlock with PV support
v4->v5: - Move the optimized 2-task contending code to the generic file to enable more architectures to use it without code duplication. - Address some of the style-related comments by PeterZ. - Allow the use of unfair queue spinlock in a real para-virtualized execution environment. - Add para-virtualization support to the qspinlock code by ensuring that the lock holder and queue
2014 Feb 27
14
[PATCH v5 0/8] qspinlock: a 4-byte queue spinlock with PV support
v4->v5: - Move the optimized 2-task contending code to the generic file to enable more architectures to use it without code duplication. - Address some of the style-related comments by PeterZ. - Allow the use of unfair queue spinlock in a real para-virtualized execution environment. - Add para-virtualization support to the qspinlock code by ensuring that the lock holder and queue