search for: _qspinlock_lwmask

...g lock acquirer so that it won't need to go through the + * MCS style locking queuing which has a higher overhead. */ +#define _QSPINLOCK_WAIT_SHIFT 8 /* Waiting bit position */ +#define _QSPINLOCK_WAITING (1 << _QSPINLOCK_WAIT_SHIFT) +/* Masks for lock & wait bits */ +#define _QSPINLOCK_LWMASK (_QSPINLOCK_WAITING | _QSPINLOCK_LOCKED) + #define queue_encode_qcode(cpu, idx) (((cpu) + 1) << 2 | (idx)) +#define queue_get_qcode(lock) (atomic_read(&(lock)->qlcode) >> _QCODE_OFFSET) + +#define queue_spin_trylock_quick queue_spin_trylock_quick +/** + * queue_spin_trylock_quic...

...to go through the + * MCS style locking queuing which has a higher overhead. + * 2) The 16-bit queue code can be accessed or modified directly as a + * 16-bit short value without disturbing the first 2 bytes. + */ +#define _QSPINLOCK_WAITING 0x100U /* Waiting bit in 2nd byte */ +#define _QSPINLOCK_LWMASK 0xffff /* Mask for lock & wait bits */ + +#define queue_encode_qcode(cpu, idx) (((cpu) + 1) << 2 | (idx)) + +#define queue_spin_trylock_quick queue_spin_trylock_quick +/** + * queue_spin_trylock_quick - fast spinning on the queue spinlock + * @lock : Pointer to queue spinlock structure +...

...to go through the + * MCS style locking queuing which has a higher overhead. + * 2) The 16-bit queue code can be accessed or modified directly as a + * 16-bit short value without disturbing the first 2 bytes. + */ +#define _QSPINLOCK_WAITING 0x100U /* Waiting bit in 2nd byte */ +#define _QSPINLOCK_LWMASK 0xffff /* Mask for lock & wait bits */ + +#define queue_encode_qcode(cpu, idx) (((cpu) + 1) << 2 | (idx)) + +#define queue_spin_trylock_quick queue_spin_trylock_quick +/** + * queue_spin_trylock_quick - fast spinning on the queue spinlock + * @lock : Pointer to queue spinlock structure +...

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

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

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

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

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

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