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-rw-r--r--mm/zsmalloc.c26
1 files changed, 10 insertions, 16 deletions
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 72e0b296984b..1ce774503fa1 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -467,11 +467,6 @@ static struct zpool_driver zs_zpool_driver = {
MODULE_ALIAS("zpool-zsmalloc");
#endif /* CONFIG_ZPOOL */
-static unsigned int get_maxobj_per_zspage(int size, int pages_per_zspage)
-{
- return pages_per_zspage * PAGE_SIZE / size;
-}
-
/* per-cpu VM mapping areas for zspage accesses that cross page boundaries */
static DEFINE_PER_CPU(struct mapping_area, zs_map_area);
@@ -1359,16 +1354,14 @@ static void init_zs_size_classes(void)
zs_size_classes = nr;
}
-static bool can_merge(struct size_class *prev, int size, int pages_per_zspage)
+static bool can_merge(struct size_class *prev, int pages_per_zspage,
+ int objs_per_zspage)
{
- if (prev->pages_per_zspage != pages_per_zspage)
- return false;
+ if (prev->pages_per_zspage == pages_per_zspage &&
+ prev->objs_per_zspage == objs_per_zspage)
+ return true;
- if (prev->objs_per_zspage
- != get_maxobj_per_zspage(size, pages_per_zspage))
- return false;
-
- return true;
+ return false;
}
static bool zspage_full(struct size_class *class, struct zspage *zspage)
@@ -2438,6 +2431,7 @@ struct zs_pool *zs_create_pool(const char *name)
for (i = zs_size_classes - 1; i >= 0; i--) {
int size;
int pages_per_zspage;
+ int objs_per_zspage;
struct size_class *class;
int fullness = 0;
@@ -2445,6 +2439,7 @@ struct zs_pool *zs_create_pool(const char *name)
if (size > ZS_MAX_ALLOC_SIZE)
size = ZS_MAX_ALLOC_SIZE;
pages_per_zspage = get_pages_per_zspage(size);
+ objs_per_zspage = pages_per_zspage * PAGE_SIZE / size;
/*
* size_class is used for normal zsmalloc operation such
@@ -2456,7 +2451,7 @@ struct zs_pool *zs_create_pool(const char *name)
* previous size_class if possible.
*/
if (prev_class) {
- if (can_merge(prev_class, size, pages_per_zspage)) {
+ if (can_merge(prev_class, pages_per_zspage, objs_per_zspage)) {
pool->size_class[i] = prev_class;
continue;
}
@@ -2469,8 +2464,7 @@ struct zs_pool *zs_create_pool(const char *name)
class->size = size;
class->index = i;
class->pages_per_zspage = pages_per_zspage;
- class->objs_per_zspage = get_maxobj_per_zspage(class->size,
- class->pages_per_zspage);
+ class->objs_per_zspage = objs_per_zspage;
spin_lock_init(&class->lock);
pool->size_class[i] = class;
for (fullness = ZS_EMPTY; fullness < NR_ZS_FULLNESS;