diff options
| author | Miaohe Lin <linmiaohe@huawei.com> | 2021-05-04 18:33:25 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-05-05 11:27:20 -0700 |
| commit | 5af1ab1d24e0842e2ca72c1fd0833864f6fa458a (patch) | |
| tree | 1907856e8b82724b1e2c34927be58438859f8400 /mm/hugetlb.c | |
| parent | 04adbc3f7bff403a97355531da0190a263d66ea5 (diff) | |
mm/hugetlb: optimize the surplus state transfer code in move_hugetlb_state()
We should not transfer the per-node surplus state when we do not cross the
node in order to save some cpu cycles
Link: https://lkml.kernel.org/r/20210308112809.26107-3-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/hugetlb.c')
| -rw-r--r-- | mm/hugetlb.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 87104dc78e59..c3d47af59137 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -5682,6 +5682,12 @@ void move_hugetlb_state(struct page *oldpage, struct page *newpage, int reason) SetHPageTemporary(oldpage); ClearHPageTemporary(newpage); + /* + * There is no need to transfer the per-node surplus state + * when we do not cross the node. + */ + if (new_nid == old_nid) + return; spin_lock(&hugetlb_lock); if (h->surplus_huge_pages_node[old_nid]) { h->surplus_huge_pages_node[old_nid]--; |