diff options
Diffstat (limited to 'kern/slab.h')
| -rw-r--r-- | kern/slab.h | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/kern/slab.h b/kern/slab.h index fd65893..457dee4 100644 --- a/kern/slab.h +++ b/kern/slab.h @@ -157,6 +157,10 @@ typedef void (*kmem_slab_free_fn_t)(vm_offset_t, vm_size_t); * Cache of objects. * * Locking order : cpu_pool -> cache. CPU pools locking is ordered by CPU ID. + * + * Currently, SLAB_USE_CPU_POOLS is not defined. KMEM_CACHE_NAME_SIZE + * is chosen so that the struct fits into two cache lines. The first + * cache line contains all hot fields. */ struct kmem_cache { #if SLAB_USE_CPU_POOLS @@ -172,19 +176,21 @@ struct kmem_cache { struct list free_slabs; struct rbtree active_slabs; int flags; + size_t bufctl_dist; /* Distance from buffer to bufctl */ + size_t slab_size; + unsigned long bufs_per_slab; + unsigned long nr_objs; /* Number of allocated objects */ + unsigned long nr_free_slabs; + kmem_cache_ctor_t ctor; + /* All fields below are cold */ size_t obj_size; /* User-provided size */ + /* Assuming ! SLAB_USE_CPU_POOLS, here is the cacheline boundary */ size_t align; size_t buf_size; /* Aligned object size */ - size_t bufctl_dist; /* Distance from buffer to bufctl */ - size_t slab_size; size_t color; size_t color_max; - unsigned long bufs_per_slab; - unsigned long nr_objs; /* Number of allocated objects */ unsigned long nr_bufs; /* Total number of buffers */ unsigned long nr_slabs; - unsigned long nr_free_slabs; - kmem_cache_ctor_t ctor; kmem_slab_alloc_fn_t slab_alloc_fn; kmem_slab_free_fn_t slab_free_fn; char name[KMEM_CACHE_NAME_SIZE]; |