diff options
Diffstat (limited to 'mm/zsmalloc.c')
| -rw-r--r-- | mm/zsmalloc.c | 29 |
1 files changed, 15 insertions, 14 deletions
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index 2a1f95249f12..8f76d8875aca 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -245,6 +245,7 @@ struct zs_pool { gfp_t flags; /* allocation flags used when growing pool */ atomic_long_t pages_allocated; + struct zs_pool_stats stats; #ifdef CONFIG_ZSMALLOC_STAT struct dentry *stat_dentry; #endif @@ -1578,7 +1579,7 @@ struct zs_compact_control { /* Starting object index within @s_page which used for live object * in the subpage. */ int index; - /* how many of objects are migrated */ + /* How many of objects were migrated */ int nr_migrated; }; @@ -1590,7 +1591,6 @@ static int migrate_zspage(struct zs_pool *pool, struct size_class *class, struct page *s_page = cc->s_page; struct page *d_page = cc->d_page; unsigned long index = cc->index; - int nr_migrated = 0; int ret = 0; while (1) { @@ -1617,13 +1617,12 @@ static int migrate_zspage(struct zs_pool *pool, struct size_class *class, record_obj(handle, free_obj); unpin_tag(handle); obj_free(pool, class, used_obj); - nr_migrated++; + cc->nr_migrated++; } /* Remember last position in this iteration */ cc->s_page = s_page; cc->index = index; - cc->nr_migrated = nr_migrated; return ret; } @@ -1699,14 +1698,13 @@ static unsigned long zs_can_compact(struct size_class *class) return obj_wasted * get_pages_per_zspage(class->size); } -static unsigned long __zs_compact(struct zs_pool *pool, - struct size_class *class) +static void __zs_compact(struct zs_pool *pool, struct size_class *class) { struct zs_compact_control cc; struct page *src_page; struct page *dst_page = NULL; - unsigned long nr_total_migrated = 0; + cc.nr_migrated = 0; spin_lock(&class->lock); while ((src_page = isolate_source_page(class))) { @@ -1728,7 +1726,6 @@ static unsigned long __zs_compact(struct zs_pool *pool, break; putback_zspage(pool, class, dst_page); - nr_total_migrated += cc.nr_migrated; } /* Stop if we couldn't find slot */ @@ -1738,7 +1735,6 @@ static unsigned long __zs_compact(struct zs_pool *pool, putback_zspage(pool, class, dst_page); putback_zspage(pool, class, src_page); spin_unlock(&class->lock); - nr_total_migrated += cc.nr_migrated; cond_resched(); spin_lock(&class->lock); } @@ -1746,15 +1742,14 @@ static unsigned long __zs_compact(struct zs_pool *pool, if (src_page) putback_zspage(pool, class, src_page); - spin_unlock(&class->lock); + pool->stats.num_migrated += cc.nr_migrated; - return nr_total_migrated; + spin_unlock(&class->lock); } unsigned long zs_compact(struct zs_pool *pool) { int i; - unsigned long nr_migrated = 0; struct size_class *class; for (i = zs_size_classes - 1; i >= 0; i--) { @@ -1763,13 +1758,19 @@ unsigned long zs_compact(struct zs_pool *pool) continue; if (class->index != i) continue; - nr_migrated += __zs_compact(pool, class); + __zs_compact(pool, class); } - return nr_migrated; + return pool->stats.num_migrated; } EXPORT_SYMBOL_GPL(zs_compact); +void zs_pool_stats(struct zs_pool *pool, struct zs_pool_stats *stats) +{ + memcpy(stats, &pool->stats, sizeof(struct zs_pool_stats)); +} +EXPORT_SYMBOL_GPL(zs_pool_stats); + /** * zs_create_pool - Creates an allocation pool to work from. * @flags: allocation flags used to allocate pool metadata |