search for: paca

...bm.com>, IBM + * Rework to support virtual processors + * + * Type of int is used as a full 64b word is not necessary. + * + * (the type definitions are in asm/simple_spinlock_types.h) + */ +#include <linux/irqflags.h> +#include <asm/paravirt.h> +#ifdef CONFIG_PPC64 +#include <asm/paca.h> +#endif +#include <asm/synch.h> +#include <asm/ppc-opcode.h> + +#ifdef CONFIG_PPC64 +/* use 0x800000yy when locked, where yy == CPU number */ +#ifdef __BIG_ENDIAN__ +#define LOCK_TOKEN (*(u32 *)(&get_paca()->lock_token)) +#else +#define LOCK_TOKEN (*(u32 *)(&get_paca()-...

...--- /dev/null +++ b/arch/powerpc/include/asm/paravirt.h @@ -0,0 +1,61 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +#ifndef __ASM_PARAVIRT_H +#define __ASM_PARAVIRT_H +#ifdef __KERNEL__ + +#include <linux/jump_label.h> +#include <asm/smp.h> +#ifdef CONFIG_PPC64 +#include <asm/paca.h> +#include <asm/hvcall.h> +#endif + +#ifdef CONFIG_PPC_SPLPAR +DECLARE_STATIC_KEY_FALSE(shared_processor); + +static inline bool is_shared_processor(void) +{ + return static_branch_unlikely(&shared_processor); +} + +/* If bit 0 is set, the cpu has been preempted */ +static inline u32...

.../powerpc/include/asm/spinlock.h > +++ b/arch/powerpc/include/asm/spinlock.h > @@ -52,6 +52,20 @@ > ?#define SYNC_IO > ?#endif > ? > +#if defined(CONFIG_PPC_SPLPAR) > +/* We only yield to the hypervisor if we are in shared processor > mode */ > +#define SHARED_PROCESSOR (lppaca_shared_proc(local_paca- > >lppaca_ptr)) > +extern void __spin_yield(arch_spinlock_t *lock); > +extern void __rw_yield(arch_rwlock_t *lock); > +#else /* SPLPAR */ > +#define __spin_yield(x) barrier() > +#define __rw_yield(x) barrier() > +#define SHARED_PROCESSOR 0 > +#endi...

.../powerpc/include/asm/spinlock.h > +++ b/arch/powerpc/include/asm/spinlock.h > @@ -52,6 +52,20 @@ > ?#define SYNC_IO > ?#endif > ? > +#if defined(CONFIG_PPC_SPLPAR) > +/* We only yield to the hypervisor if we are in shared processor > mode */ > +#define SHARED_PROCESSOR (lppaca_shared_proc(local_paca- > >lppaca_ptr)) > +extern void __spin_yield(arch_spinlock_t *lock); > +extern void __rw_yield(arch_rwlock_t *lock); > +#else /* SPLPAR */ > +#define __spin_yield(x) barrier() > +#define __rw_yield(x) barrier() > +#define SHARED_PROCESSOR 0 > +#endi...

v2 is updated to account for feedback from Will, Peter, and Waiman (thank you), and trims off a couple of RFC and unrelated patches. Thanks, Nick Nicholas Piggin (6): powerpc/powernv: must include hvcall.h to get PAPR defines powerpc/pseries: move some PAPR paravirt functions to their own file powerpc: move spinlock implementation to simple_spinlock powerpc/64s: implement queued

This series adds an option to use queued spinlocks for powerpc, and makes it the default for the Book3S-64 subarch. This effort starts with the generic code so it's very simple but still very performant. There are optimisations that can be made to slowpaths, but I think it's better to attack those incrementally if/when we find things, and try to add the improvements to generic code as

v3 is updated to use __pv_queued_spin_unlock, noticed by Waiman (thank you). Thanks, Nick Nicholas Piggin (6): powerpc/powernv: must include hvcall.h to get PAPR defines powerpc/pseries: move some PAPR paravirt functions to their own file powerpc: move spinlock implementation to simple_spinlock powerpc/64s: implement queued spinlocks and rwlocks powerpc/pseries: implement paravirt

v3 is updated to use __pv_queued_spin_unlock, noticed by Waiman (thank you). Thanks, Nick Nicholas Piggin (6): powerpc/powernv: must include hvcall.h to get PAPR defines powerpc/pseries: move some PAPR paravirt functions to their own file powerpc: move spinlock implementation to simple_spinlock powerpc/64s: implement queued spinlocks and rwlocks powerpc/pseries: implement paravirt

Updated with everybody's feedback (thanks all), and more performance results. What I've found is I might have been measuring the worst load point for the paravirt case, and by looking at a range of loads it's clear that queued spinlocks are overall better even on PV, doubly so when you look at the generally much improved worst case latencies. I have defaulted it to N even though

I would like to have a function that inputs a file name, then reads that data file and does various stuff to it. Something like: doit<-function(filename) { x<-scan("~/rstuff/data/"filename) #for example, if filename is a0.dat, it will scan("~/rstuff/data/a0.dat") ... } Can someone please tell me how to do this? Thanks for any help! Bill Simpson

I'm trying to setup samba with ldapsam (Novell eDir 8.7.1). Right now I can login to samba and browse my shares with user "Administrator", but when I'm trying to add computer to domain I get "unknown user name or bad password" error. I have administrator, root and nobody accounts in ldap. And I have manualy added following groupmappings to ldap-groups: Domain Users

...ck.h index 523673d..4359ee6 100644 --- a/arch/powerpc/include/asm/spinlock.h +++ b/arch/powerpc/include/asm/spinlock.h @@ -52,6 +52,20 @@ #define SYNC_IO #endif +#if defined(CONFIG_PPC_SPLPAR) +/* We only yield to the hypervisor if we are in shared processor mode */ +#define SHARED_PROCESSOR (lppaca_shared_proc(local_paca->lppaca_ptr)) +extern void __spin_yield(arch_spinlock_t *lock); +extern void __rw_yield(arch_rwlock_t *lock); +#else /* SPLPAR */ +#define __spin_yield(x) barrier() +#define __rw_yield(x) barrier() +#define SHARED_PROCESSOR 0 +#endif + +#ifdef CONFIG_QUEUED_SPINLOCKS +#inc...

...ck.h index 523673d..4359ee6 100644 --- a/arch/powerpc/include/asm/spinlock.h +++ b/arch/powerpc/include/asm/spinlock.h @@ -52,6 +52,20 @@ #define SYNC_IO #endif +#if defined(CONFIG_PPC_SPLPAR) +/* We only yield to the hypervisor if we are in shared processor mode */ +#define SHARED_PROCESSOR (lppaca_shared_proc(local_paca->lppaca_ptr)) +extern void __spin_yield(arch_spinlock_t *lock); +extern void __rw_yield(arch_rwlock_t *lock); +#else /* SPLPAR */ +#define __spin_yield(x) barrier() +#define __rw_yield(x) barrier() +#define SHARED_PROCESSOR 0 +#endif + +#ifdef CONFIG_QUEUED_SPINLOCKS +#inc...

...ck.h > +++ b/arch/powerpc/include/asm/spinlock.h > @@ -60,6 +60,23 @@ static inline bool vcpu_is_preempted(int cpu) > } > #endif > > +#if defined(CONFIG_PPC_SPLPAR) > +/* We only yield to the hypervisor if we are in shared processor mode */ > +#define SHARED_PROCESSOR (lppaca_shared_proc(local_paca->lppaca_ptr)) > +extern void __spin_yield(arch_spinlock_t *lock); > +extern void __rw_yield(arch_rwlock_t *lock); > +#else /* SPLPAR */ > +#define __spin_yield(x) barrier() > +#define __rw_yield(x) barrier() > +#define SHARED_PROCESSOR 0 &gt...

...ck.h > +++ b/arch/powerpc/include/asm/spinlock.h > @@ -60,6 +60,23 @@ static inline bool vcpu_is_preempted(int cpu) > } > #endif > > +#if defined(CONFIG_PPC_SPLPAR) > +/* We only yield to the hypervisor if we are in shared processor mode */ > +#define SHARED_PROCESSOR (lppaca_shared_proc(local_paca->lppaca_ptr)) > +extern void __spin_yield(arch_spinlock_t *lock); > +extern void __rw_yield(arch_rwlock_t *lock); > +#else /* SPLPAR */ > +#define __spin_yield(x) barrier() > +#define __rw_yield(x) barrier() > +#define SHARED_PROCESSOR 0 &gt...

...b/arch/powerpc/include/asm/spinlock.h > > @@ -52,6 +52,20 @@ > > ?#define SYNC_IO > > ?#endif > > ? > > +#if defined(CONFIG_PPC_SPLPAR) > > +/* We only yield to the hypervisor if we are in shared processor > > mode */ > > +#define SHARED_PROCESSOR (lppaca_shared_proc(local_paca- > > > > > > lppaca_ptr)) > > +extern void __spin_yield(arch_spinlock_t *lock); > > +extern void __rw_yield(arch_rwlock_t *lock); > > +#else /* SPLPAR */ > > +#define __spin_yield(x) barrier() > > +#define __rw_yield(x) barrier...

...44 --- a/arch/powerpc/include/asm/spinlock.h +++ b/arch/powerpc/include/asm/spinlock.h @@ -60,6 +60,23 @@ static inline bool vcpu_is_preempted(int cpu) } #endif +#if defined(CONFIG_PPC_SPLPAR) +/* We only yield to the hypervisor if we are in shared processor mode */ +#define SHARED_PROCESSOR (lppaca_shared_proc(local_paca->lppaca_ptr)) +extern void __spin_yield(arch_spinlock_t *lock); +extern void __rw_yield(arch_rwlock_t *lock); +#else /* SPLPAR */ +#define __spin_yield(x) barrier() +#define __rw_yield(x) barrier() +#define SHARED_PROCESSOR 0 +#endif + +#ifdef CONFIG_QUEUED_S...

...ck.h index 523673d..3b65372 100644 --- a/arch/powerpc/include/asm/spinlock.h +++ b/arch/powerpc/include/asm/spinlock.h @@ -52,6 +52,24 @@ #define SYNC_IO #endif +#if defined(CONFIG_PPC_SPLPAR) +/* We only yield to the hypervisor if we are in shared processor mode */ +#define SHARED_PROCESSOR (lppaca_shared_proc(local_paca->lppaca_ptr)) +extern void __spin_yield(arch_spinlock_t *lock); +extern void __spin_yield_cpu(int cpu); +extern void __spin_wake_cpu(int cpu); +extern void __rw_yield(arch_rwlock_t *lock); +#else /* SPLPAR */ +#define __spin_yield(x) barrier() +#define __spin_yield_cpu(x)...

...ck.h index 523673d..3b65372 100644 --- a/arch/powerpc/include/asm/spinlock.h +++ b/arch/powerpc/include/asm/spinlock.h @@ -52,6 +52,24 @@ #define SYNC_IO #endif +#if defined(CONFIG_PPC_SPLPAR) +/* We only yield to the hypervisor if we are in shared processor mode */ +#define SHARED_PROCESSOR (lppaca_shared_proc(local_paca->lppaca_ptr)) +extern void __spin_yield(arch_spinlock_t *lock); +extern void __spin_yield_cpu(int cpu); +extern void __spin_wake_cpu(int cpu); +extern void __rw_yield(arch_rwlock_t *lock); +#else /* SPLPAR */ +#define __spin_yield(x) barrier() +#define __spin_yield_cpu(x)...

...asm/spinlock.h >>> @@ -52,6 +52,20 @@ >>> #define SYNC_IO >>> #endif >>> >>> +#if defined(CONFIG_PPC_SPLPAR) >>> +/* We only yield to the hypervisor if we are in shared processor >>> mode */ >>> +#define SHARED_PROCESSOR (lppaca_shared_proc(local_paca- >>>> >>>> lppaca_ptr)) >>> +extern void __spin_yield(arch_spinlock_t *lock); >>> +extern void __rw_yield(arch_rwlock_t *lock); >>> +#else /* SPLPAR */ >>> +#define __spin_yield(x) barrier() >>> +#define __r...