diff options
Diffstat (limited to 'drivers/infiniband/hw/hfi1/mmu_rb.h')
| -rw-r--r-- | drivers/infiniband/hw/hfi1/mmu_rb.h | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/drivers/infiniband/hw/hfi1/mmu_rb.h b/drivers/infiniband/hw/hfi1/mmu_rb.h index 7417be2b9dc8..c4da064188c9 100644 --- a/drivers/infiniband/hw/hfi1/mmu_rb.h +++ b/drivers/infiniband/hw/hfi1/mmu_rb.h @@ -33,15 +33,25 @@ struct mmu_rb_ops { }; struct mmu_rb_handler { + /* + * struct mmu_notifier is 56 bytes, and spinlock_t is 4 bytes, so + * they fit together in one cache line. mn is relatively rarely + * accessed, so co-locating the spinlock with it achieves much of + * the cacheline contention reduction of giving the spinlock its own + * cacheline without the overhead of doing so. + */ struct mmu_notifier mn; - struct rb_root_cached root; - void *ops_arg; spinlock_t lock; /* protect the RB tree */ + + /* Begin on a new cachline boundary here */ + struct rb_root_cached root ____cacheline_aligned_in_smp; + void *ops_arg; struct mmu_rb_ops *ops; struct list_head lru_list; struct work_struct del_work; struct list_head del_list; struct workqueue_struct *wq; + void *free_ptr; }; int hfi1_mmu_rb_register(void *ops_arg, @@ -52,10 +62,8 @@ void hfi1_mmu_rb_unregister(struct mmu_rb_handler *handler); int hfi1_mmu_rb_insert(struct mmu_rb_handler *handler, struct mmu_rb_node *mnode); void hfi1_mmu_rb_evict(struct mmu_rb_handler *handler, void *evict_arg); -void hfi1_mmu_rb_remove(struct mmu_rb_handler *handler, - struct mmu_rb_node *mnode); -bool hfi1_mmu_rb_remove_unless_exact(struct mmu_rb_handler *handler, - unsigned long addr, unsigned long len, - struct mmu_rb_node **rb_node); +struct mmu_rb_node *hfi1_mmu_rb_get_first(struct mmu_rb_handler *handler, + unsigned long addr, + unsigned long len); #endif /* _HFI1_MMU_RB_H */ |