mm/zsmalloc: take obj index back from find_alloced_obj
the obj index value should be updated after return from
find_alloced_obj() to avoid CPU burning caused by unnecessary object
scanning.
Link: http://lkml.kernel.org/r/1467882338-4300-2-git-send-email-opensource.ganesh@gmail.com
Signed-off-by: Ganesh Mahendran <opensource.ganesh@gmail.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 0b4790e..49143de 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -1741,10 +1741,11 @@
* return handle.
*/
static unsigned long find_alloced_obj(struct size_class *class,
- struct page *page, int index)
+ struct page *page, int *obj_idx)
{
unsigned long head;
int offset = 0;
+ int index = *obj_idx;
unsigned long handle = 0;
void *addr = kmap_atomic(page);
@@ -1765,6 +1766,9 @@
}
kunmap_atomic(addr);
+
+ *obj_idx = index;
+
return handle;
}
@@ -1790,7 +1794,7 @@
int ret = 0;
while (1) {
- handle = find_alloced_obj(class, s_page, obj_idx);
+ handle = find_alloced_obj(class, s_page, &obj_idx);
if (!handle) {
s_page = get_next_page(s_page);
if (!s_page)