search for: _q_tail_cpu_mask

...++++------------- > 2 files changed, 38 insertions(+), 22 deletions(-) > > --- a/include/asm-generic/qspinlock_types.h > +++ b/include/asm-generic/qspinlock_types.h > @@ -61,6 +61,8 @@ typedef struct qspinlock { > #define _Q_TAIL_CPU_BITS (32 - _Q_TAIL_CPU_OFFSET) > #define _Q_TAIL_CPU_MASK _Q_SET_MASK(TAIL_CPU) > > +#define _Q_TAIL_MASK (_Q_TAIL_IDX_MASK | _Q_TAIL_CPU_MASK) > + > #define _Q_LOCKED_VAL (1U << _Q_LOCKED_OFFSET) > #define _Q_PENDING_VAL (1U << _Q_PENDING_OFFSET) > > --- a/kernel/locking/qspinlock.c > +++ b/kernel/locking/qspi...

...++++------------- > 2 files changed, 38 insertions(+), 22 deletions(-) > > --- a/include/asm-generic/qspinlock_types.h > +++ b/include/asm-generic/qspinlock_types.h > @@ -61,6 +61,8 @@ typedef struct qspinlock { > #define _Q_TAIL_CPU_BITS (32 - _Q_TAIL_CPU_OFFSET) > #define _Q_TAIL_CPU_MASK _Q_SET_MASK(TAIL_CPU) > > +#define _Q_TAIL_MASK (_Q_TAIL_IDX_MASK | _Q_TAIL_CPU_MASK) > + > #define _Q_LOCKED_VAL (1U << _Q_LOCKED_OFFSET) > #define _Q_PENDING_VAL (1U << _Q_PENDING_OFFSET) > > --- a/kernel/locking/qspinlock.c > +++ b/kernel/locking/qspi...

...| 58 +++++++++++++++++++++------------- 2 files changed, 38 insertions(+), 22 deletions(-) --- a/include/asm-generic/qspinlock_types.h +++ b/include/asm-generic/qspinlock_types.h @@ -61,6 +61,8 @@ typedef struct qspinlock { #define _Q_TAIL_CPU_BITS (32 - _Q_TAIL_CPU_OFFSET) #define _Q_TAIL_CPU_MASK _Q_SET_MASK(TAIL_CPU) +#define _Q_TAIL_MASK (_Q_TAIL_IDX_MASK | _Q_TAIL_CPU_MASK) + #define _Q_LOCKED_VAL (1U << _Q_LOCKED_OFFSET) #define _Q_PENDING_VAL (1U << _Q_PENDING_OFFSET) --- a/kernel/locking/qspinlock.c +++ b/kernel/locking/qspinlock.c @@ -86,6 +86,31 @@ static inline...

...clude/asm-generic/qspinlock_types.h b/include/asm-generic/qspinlock_types.h index bd25081..ed5d89a 100644 --- a/include/asm-generic/qspinlock_types.h +++ b/include/asm-generic/qspinlock_types.h @@ -61,6 +61,8 @@ typedef struct qspinlock { #define _Q_TAIL_CPU_BITS (32 - _Q_TAIL_CPU_OFFSET) #define _Q_TAIL_CPU_MASK _Q_SET_MASK(TAIL_CPU) +#define _Q_TAIL_MASK (_Q_TAIL_IDX_MASK | _Q_TAIL_CPU_MASK) + #define _Q_LOCKED_VAL (1U << _Q_LOCKED_OFFSET) #define _Q_PENDING_VAL (1U << _Q_PENDING_OFFSET) diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c index d35362a..fcf06cb 100644...

...2 files changed, 38 insertions(+), 22 deletions(-) >> >> --- a/include/asm-generic/qspinlock_types.h >> +++ b/include/asm-generic/qspinlock_types.h >> @@ -61,6 +61,8 @@ typedef struct qspinlock { >> #define _Q_TAIL_CPU_BITS (32 - _Q_TAIL_CPU_OFFSET) >> #define _Q_TAIL_CPU_MASK _Q_SET_MASK(TAIL_CPU) >> >> +#define _Q_TAIL_MASK (_Q_TAIL_IDX_MASK | _Q_TAIL_CPU_MASK) >> + >> #define _Q_LOCKED_VAL (1U << _Q_LOCKED_OFFSET) >> #define _Q_PENDING_VAL (1U << _Q_PENDING_OFFSET) >> >> --- a/kernel/locking/qspinlock.c >&g...

...lt; 14) +#define _Q_PENDING_BITS 8 +#else #define _Q_PENDING_BITS 1 +#endif #define _Q_PENDING_MASK _Q_SET_MASK(PENDING) #define _Q_TAIL_IDX_OFFSET (_Q_PENDING_OFFSET + _Q_PENDING_BITS) @@ -61,6 +73,7 @@ typedef struct qspinlock { #define _Q_TAIL_CPU_BITS (32 - _Q_TAIL_CPU_OFFSET) #define _Q_TAIL_CPU_MASK _Q_SET_MASK(TAIL_CPU) +#define _Q_TAIL_OFFSET _Q_TAIL_IDX_OFFSET #define _Q_TAIL_MASK (_Q_TAIL_IDX_MASK | _Q_TAIL_CPU_MASK) #define _Q_LOCKED_VAL (1U << _Q_LOCKED_OFFSET) --- a/kernel/locking/qspinlock.c +++ b/kernel/locking/qspinlock.c @@ -22,6 +22,7 @@ #include <linux/percpu.h&...

...lt; 14) +#define _Q_PENDING_BITS 8 +#else #define _Q_PENDING_BITS 1 +#endif #define _Q_PENDING_MASK _Q_SET_MASK(PENDING) #define _Q_TAIL_IDX_OFFSET (_Q_PENDING_OFFSET + _Q_PENDING_BITS) @@ -61,6 +73,7 @@ typedef struct qspinlock { #define _Q_TAIL_CPU_BITS (32 - _Q_TAIL_CPU_OFFSET) #define _Q_TAIL_CPU_MASK _Q_SET_MASK(TAIL_CPU) +#define _Q_TAIL_OFFSET _Q_TAIL_IDX_OFFSET #define _Q_TAIL_MASK (_Q_TAIL_IDX_MASK | _Q_TAIL_CPU_MASK) #define _Q_LOCKED_VAL (1U << _Q_LOCKED_OFFSET) diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c index fcf06cb..55601b4 100644 --- a/kernel/l...

...se > #define _Q_PENDING_BITS 1 > +#endif > #define _Q_PENDING_MASK _Q_SET_MASK(PENDING) > > #define _Q_TAIL_IDX_OFFSET (_Q_PENDING_OFFSET + _Q_PENDING_BITS) > @@ -61,6 +73,7 @@ typedef struct qspinlock { > #define _Q_TAIL_CPU_BITS (32 - _Q_TAIL_CPU_OFFSET) > #define _Q_TAIL_CPU_MASK _Q_SET_MASK(TAIL_CPU) > > +#define _Q_TAIL_OFFSET _Q_TAIL_IDX_OFFSET > #define _Q_TAIL_MASK (_Q_TAIL_IDX_MASK | _Q_TAIL_CPU_MASK) > > #define _Q_LOCKED_VAL (1U << _Q_LOCKED_OFFSET) > --- a/kernel/locking/qspinlock.c > +++ b/kernel/locking/qspinlock.c > @@ -22,...

...se > #define _Q_PENDING_BITS 1 > +#endif > #define _Q_PENDING_MASK _Q_SET_MASK(PENDING) > > #define _Q_TAIL_IDX_OFFSET (_Q_PENDING_OFFSET + _Q_PENDING_BITS) > @@ -61,6 +73,7 @@ typedef struct qspinlock { > #define _Q_TAIL_CPU_BITS (32 - _Q_TAIL_CPU_OFFSET) > #define _Q_TAIL_CPU_MASK _Q_SET_MASK(TAIL_CPU) > > +#define _Q_TAIL_OFFSET _Q_TAIL_IDX_OFFSET > #define _Q_TAIL_MASK (_Q_TAIL_IDX_MASK | _Q_TAIL_CPU_MASK) > > #define _Q_LOCKED_VAL (1U << _Q_LOCKED_OFFSET) > --- a/kernel/locking/qspinlock.c > +++ b/kernel/locking/qspinlock.c > @@ -22,...

Since Waiman seems incapable of doing simple things; here's my take on the paravirt crap. The first few patches are taken from Waiman's latest series, but the virt support is completely new. Its primary aim is to not mess up the native code. I've not stress tested it, but the virt and paravirt (kvm) cases boot on simple smp guests. I've not done Xen, but the patch should be

Since Waiman seems incapable of doing simple things; here's my take on the paravirt crap. The first few patches are taken from Waiman's latest series, but the virt support is completely new. Its primary aim is to not mess up the native code. I've not stress tested it, but the virt and paravirt (kvm) cases boot on simple smp guests. I've not done Xen, but the patch should be

...OFFSET + _Q_LOCKED_BITS) +#define _Q_PENDING_BITS 1 +#define _Q_PENDING_MASK _Q_SET_MASK(PENDING) + +#define _Q_TAIL_IDX_OFFSET (_Q_PENDING_OFFSET + _Q_PENDING_BITS) #define _Q_TAIL_IDX_BITS 2 #define _Q_TAIL_IDX_MASK _Q_SET_MASK(TAIL_IDX) @@ -57,5 +62,6 @@ typedef struct qspinlock { #define _Q_TAIL_CPU_MASK _Q_SET_MASK(TAIL_CPU) #define _Q_LOCKED_VAL (1U << _Q_LOCKED_OFFSET) +#define _Q_PENDING_VAL (1U << _Q_PENDING_OFFSET) #endif /* __ASM_GENERIC_QSPINLOCK_TYPES_H */ --- a/kernel/locking/qspinlock.c +++ b/kernel/locking/qspinlock.c @@ -83,24 +83,28 @@ static inline struct mcs_spin...

...OFFSET + _Q_LOCKED_BITS) +#define _Q_PENDING_BITS 1 +#define _Q_PENDING_MASK _Q_SET_MASK(PENDING) + +#define _Q_TAIL_IDX_OFFSET (_Q_PENDING_OFFSET + _Q_PENDING_BITS) #define _Q_TAIL_IDX_BITS 2 #define _Q_TAIL_IDX_MASK _Q_SET_MASK(TAIL_IDX) @@ -57,5 +62,6 @@ typedef struct qspinlock { #define _Q_TAIL_CPU_MASK _Q_SET_MASK(TAIL_CPU) #define _Q_LOCKED_VAL (1U << _Q_LOCKED_OFFSET) +#define _Q_PENDING_VAL (1U << _Q_PENDING_OFFSET) #endif /* __ASM_GENERIC_QSPINLOCK_TYPES_H */ diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c index b97a1ad..d35362a 100644 --- a/kernel/loc...

...OFFSET + _Q_LOCKED_BITS) +#define _Q_PENDING_BITS 1 +#define _Q_PENDING_MASK _Q_SET_MASK(PENDING) + +#define _Q_TAIL_IDX_OFFSET (_Q_PENDING_OFFSET + _Q_PENDING_BITS) #define _Q_TAIL_IDX_BITS 2 #define _Q_TAIL_IDX_MASK _Q_SET_MASK(TAIL_IDX) @@ -57,5 +62,6 @@ typedef struct qspinlock { #define _Q_TAIL_CPU_MASK _Q_SET_MASK(TAIL_CPU) #define _Q_LOCKED_VAL (1U << _Q_LOCKED_OFFSET) +#define _Q_PENDING_VAL (1U << _Q_PENDING_OFFSET) #endif /* __ASM_GENERIC_QSPINLOCK_TYPES_H */ diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c index b97a1ad..6467bfc 100644 --- a/kernel/loc...

...OFFSET + _Q_LOCKED_BITS) +#define _Q_PENDING_BITS 1 +#define _Q_PENDING_MASK _Q_SET_MASK(PENDING) + +#define _Q_TAIL_IDX_OFFSET (_Q_PENDING_OFFSET + _Q_PENDING_BITS) #define _Q_TAIL_IDX_BITS 2 #define _Q_TAIL_IDX_MASK _Q_SET_MASK(TAIL_IDX) @@ -54,5 +59,6 @@ typedef struct qspinlock { #define _Q_TAIL_CPU_MASK _Q_SET_MASK(TAIL_CPU) #define _Q_LOCKED_VAL (1U << _Q_LOCKED_OFFSET) +#define _Q_PENDING_VAL (1U << _Q_PENDING_OFFSET) #endif /* __ASM_GENERIC_QSPINLOCK_TYPES_H */ --- a/kernel/locking/qspinlock.c +++ b/kernel/locking/qspinlock.c @@ -94,24 +94,28 @@ static inline struct mcs_spin...

v11->v12: - Based on PeterZ's version of the qspinlock patch (https://lkml.org/lkml/2014/6/15/63). - Incorporated many of the review comments from Konrad Wilk and Paolo Bonzini. - The pvqspinlock code is largely from my previous version with PeterZ's way of going from queue tail to head and his idea of using callee saved calls to KVM and XEN codes. v10->v11: - Use a

v11->v12: - Based on PeterZ's version of the qspinlock patch (https://lkml.org/lkml/2014/6/15/63). - Incorporated many of the review comments from Konrad Wilk and Paolo Bonzini. - The pvqspinlock code is largely from my previous version with PeterZ's way of going from queue tail to head and his idea of using callee saved calls to KVM and XEN codes. v10->v11: - Use a

v13->v14: - Patches 1 & 2: Add queue_spin_unlock_wait() to accommodate commit 78bff1c86 from Oleg Nesterov. - Fix the system hang problem when using PV qspinlock in an over-committed guest due to a racing condition in the pv_set_head_in_tail() function. - Increase the MAYHALT_THRESHOLD from 10 to 1024. - Change kick_cpu into a regular function pointer instead of a

v13->v14: - Patches 1 & 2: Add queue_spin_unlock_wait() to accommodate commit 78bff1c86 from Oleg Nesterov. - Fix the system hang problem when using PV qspinlock in an over-committed guest due to a racing condition in the pv_set_head_in_tail() function. - Increase the MAYHALT_THRESHOLD from 10 to 1024. - Change kick_cpu into a regular function pointer instead of a

Hi Waiman, As promised; here is the paravirt stuff I did during the trip to BOS last week. All the !paravirt patches are more or less the same as before (the only real change is the copyright lines in the first patch). The paravirt stuff is 'simple' and KVM only -- the Xen code was a little more convoluted and I've no real way to test that but it should be stright fwd to make work.