Commit cf675acb authored by Ganesh Mahendran's avatar Ganesh Mahendran Committed by Linus Torvalds

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.comSigned-off-by: default avatarGanesh Mahendran <opensource.ganesh@gmail.com>
Reviewed-by: default avatarSergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: default avatarMinchan Kim <minchan@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 41b88e14
......@@ -1741,10 +1741,11 @@ static void zs_object_copy(struct size_class *class, unsigned long dst,
* 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 @@ static unsigned long find_alloced_obj(struct size_class *class,
}
kunmap_atomic(addr);
*obj_idx = index;
return handle;
}
......@@ -1790,7 +1794,7 @@ static int migrate_zspage(struct zs_pool *pool, struct size_class *class,
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)
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment