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mm/zsmalloc: take obj index back from find_alloced_obj

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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>
This commit is contained in:
Ganesh Mahendran 2016-07-28 15:47:46 -07:00 committed by Linus Torvalds
parent 41b88e14c1
commit cf675acb74
1 changed files with 6 additions and 2 deletions
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8
mm/zsmalloc.c
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@ -1741,10 +1741,11 @@ static void zs_object_copy(struct size_class *class, unsigned long dst,
* return handle. * return handle.
*/ */
static unsigned long find_alloced_obj(struct size_class *class, static unsigned long find_alloced_obj(struct size_class *class,
struct page *page, int index) struct page *page, int *obj_idx)
{ {
unsigned long head; unsigned long head;
int offset = 0; int offset = 0;
int index = *obj_idx;
unsigned long handle = 0; unsigned long handle = 0;
void *addr = kmap_atomic(page); void *addr = kmap_atomic(page);
@ -1765,6 +1766,9 @@ static unsigned long find_alloced_obj(struct size_class *class,
} }
kunmap_atomic(addr); kunmap_atomic(addr);
*obj_idx = index;
return handle; return handle;
} }
@ -1790,7 +1794,7 @@ static int migrate_zspage(struct zs_pool *pool, struct size_class *class,
int ret = 0; int ret = 0;
while (1) { while (1) {
handle = find_alloced_obj(class, s_page, obj_idx); handle = find_alloced_obj(class, s_page, &obj_idx);
if (!handle) { if (!handle) {
s_page = get_next_page(s_page); s_page = get_next_page(s_page);
if (!s_page) if (!s_page)