mm/zsmalloc.c: fix comment for get_pages_per_zspage

Signed-off-by: Yinghao Xie <[email protected]> Suggested-by: Minchan Kim <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
niw · Apr 15, 2015 · 888fa37 · 888fa37
1 parent d02be50
commit 888fa37
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
@@ -731,7 +731,8 @@ static enum fullness_group fix_fullness_group(struct size_class *class,
  * to form a zspage for each size class. This is important
  * to reduce wastage due to unusable space left at end of
  * each zspage which is given as:
- *	wastage = Zp - Zp % size_class
+ *     wastage = Zp % class_size
+ *     usage = Zp - wastage
  * where Zp = zspage size = k * PAGE_SIZE where k = 1, 2, ...
  *
  * For example, for size class of 3/8 * PAGE_SIZE, we should