/*
* The minimum amount of memory measured in pages to be free at all
* times on the system. This is similar to Linux's zone->pages_min
- * multipled by the number of zones and is sized based on that.
+ * multiplied by the number of zones and is sized based on that.
*/
pgcnt_t minfree = 0;
EXPORT_SYMBOL(minfree);
/*
* The desired amount of memory measured in pages to be free at all
* times on the system. This is similar to Linux's zone->pages_low
- * multipled by the number of zones and is sized based on that.
+ * multiplied by the number of zones and is sized based on that.
* Assuming all zones are being used roughly equally, when we drop
- * below this threshold async page reclamation is triggered.
+ * below this threshold asynchronous page reclamation is triggered.
*/
pgcnt_t desfree = 0;
EXPORT_SYMBOL(desfree);
/*
* When above this amount of memory measures in pages the system is
* determined to have enough free memory. This is similar to Linux's
- * zone->pages_high multipled by the number of zones and is sized based
+ * zone->pages_high multiplied by the number of zones and is sized based
* on that. Assuming all zones are being used roughly equally, when
- * async page reclamation reaches this threshold it stops.
+ * asynchronous page reclamation reaches this threshold it stops.
*/
pgcnt_t lotsfree = 0;
EXPORT_SYMBOL(lotsfree);
* Slab allocation interfaces
*
* While the Linux slab implementation was inspired by the Solaris
- * implemenation I cannot use it to emulate the Solaris APIs. I
+ * implementation I cannot use it to emulate the Solaris APIs. I
* require two features which are not provided by the Linux slab.
*
* 1) Constructors AND destructors. Recent versions of the Linux
* Because of memory fragmentation the Linux slab which is backed
* by kmalloc'ed memory performs very badly when confronted with
* large numbers of large allocations. Basing the slab on the
- * virtual address space removes the need for contigeous pages
+ * virtual address space removes the need for contiguous pages
* and greatly improve performance for large allocations.
*
* For these reasons, the SPL has its own slab implementation with
*
* XXX: Improve the partial slab list by carefully maintaining a
* strict ordering of fullest to emptiest slabs based on
- * the slab reference count. This gaurentees the when freeing
+ * the slab reference count. This guarantees the when freeing
* slabs back to the system we need only linearly traverse the
* last N slabs in the list to discover all the freeable slabs.
*
* XXX: NUMA awareness for optionally allocating memory close to a
- * particular core. This can be adventageous if you know the slab
+ * particular core. This can be advantageous if you know the slab
* object will be short lived and primarily accessed from one core.
*
* XXX: Slab coloring may also yield performance improvements and would
* For small objects we use kmem_alloc() because as long as you are
* only requesting a small number of pages (ideally just one) its cheap.
* However, when you start requesting multiple pages with kmem_alloc()
- * it gets increasingly expensive since it requires contigeous pages.
+ * it gets increasingly expensive since it requires contiguous pages.
* For this reason we shift to vmem_alloc() for slabs of large objects
- * which removes the need for contigeous pages. We do not use
+ * which removes the need for contiguous pages. We do not use
* vmem_alloc() in all cases because there is significant locking
* overhead in __get_vm_area_node(). This function takes a single
- * global lock when aquiring an available virtual address range which
+ * global lock when acquiring an available virtual address range which
* serializes all vmem_alloc()'s for all slab caches. Using slightly
* different allocation functions for small and large objects should
* give us the best of both worlds.
* All empty slabs are at the end of skc->skc_partial_list,
* therefore once a non-empty slab is found we can stop
* scanning. Additionally, stop when reaching the target
- * reclaim 'count' if a non-zero threshhold is given.
+ * reclaim 'count' if a non-zero threshold is given.
*/
if ((sks->sks_ref > 0) || (count && i > count))
break;
/*
* Called regularly to keep a downward pressure on the size of idle
* magazines and to release free slabs from the cache. This function
- * never calls the registered reclaim function, that only occures
+ * never calls the registered reclaim function, that only occurs
* under memory pressure or with a direct call to spl_kmem_reap().
*/
static void
}
/*
- * Allocate a per-cpu magazine to assoicate with a specific core.
+ * Allocate a per-cpu magazine to associate with a specific core.
*/
static spl_kmem_magazine_t *
spl_magazine_alloc(spl_kmem_cache_t *skc, int node)
}
/*
- * Free a per-cpu magazine assoicated with a specific core.
+ * Free a per-cpu magazine associated with a specific core.
*/
static void
spl_magazine_free(spl_kmem_magazine_t *skm)
if (current_thread_info()->preempt_count || irqs_disabled())
kmem_flags = KM_NOSLEEP;
- /* Allocate memry for a new cache an initialize it. Unfortunately,
+ /* Allocate memory for a new cache an initialize it. Unfortunately,
* this usually ends up being a large allocation of ~32k because
* we need to allocate enough memory for the worst case number of
* cpus in the magazine, skc_mag[NR_CPUS]. Because of this we
EXPORT_SYMBOL(spl_kmem_cache_set_move);
/*
- * Destroy a cache and all objects assoicated with the cache.
+ * Destroy a cache and all objects associated with the cache.
*/
void
spl_kmem_cache_destroy(spl_kmem_cache_t *skc)
}
/*
- * No available objects on any slabsi, create a new slab. Since this
- * is an expensive operation we do it without holding the spinlock and
- * only briefly aquire it when we link in the fully allocated and
+ * No available objects on any slabs, create a new slab. Since this
+ * is an expensive operation we do it without holding the spin lock and
+ * only briefly acquire it when we link in the fully allocated and
* constructed slab.
*/
static spl_kmem_slab_t *
SGOTO(out, rc);
/* Potentially rescheduled to the same CPU but
- * allocations may have occured from this CPU while
+ * allocations may have occurred from this CPU while
* we were sleeping so recalculate max refill. */
refill = MIN(refill, skm->skm_size - skm->skm_avail);
list_add(&sks->sks_list, &skc->skc_partial_list);
}
- /* Move emply slabs to the end of the partial list so
+ /* Move empty slabs to the end of the partial list so
* they can be easily found and freed during reclamation. */
if (sks->sks_ref == 0) {
list_del(&sks->sks_list);
restart:
/* Safe to update per-cpu structure without lock, but
- * in the restart case we must be careful to reaquire
+ * in the restart case we must be careful to reacquire
* the local magazine since this may have changed
* when we need to grow the cache. */
skm = skc->skc_mag[smp_processor_id()];
EXPORT_SYMBOL(spl_kmem_cache_free);
/*
- * The generic shrinker function for all caches. Under linux a shrinker
- * may not be tightly coupled with a slab cache. In fact linux always
- * systematically trys calling all registered shrinker callbacks which
+ * The generic shrinker function for all caches. Under Linux a shrinker
+ * may not be tightly coupled with a slab cache. In fact Linux always
+ * systematically tries calling all registered shrinker callbacks which
* report that they contain unused objects. Because of this we only
* register one shrinker function in the shim layer for all slab caches.
* We always attempt to shrink all caches when this generic shrinker
projects / spl / commitdiff