diff mbox series

[v4,3/7] mm/hugetlb: use list_splice to merge two list at once

Message ID 20200901014636.29737-4-richard.weiyang@linux.alibaba.com (mailing list archive)
State New, archived
Headers show
Series mm/hugetlb: code refine and simplification | expand

Commit Message

Wei Yang Sept. 1, 2020, 1:46 a.m. UTC 
Instead of add allocated file_region one by one to region_cache, we
could use list_splice to merge two list at once.

Also we know the number of entries in the list, increase the number
directly.

Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com>
Reviewed-by: Baoquan He <bhe@redhat.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
---
 mm/hugetlb.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index fbaf49bc1d26..a02bf430de6f 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -443,11 +443,8 @@  static int allocate_file_region_entries(struct resv_map *resv,
 
 		spin_lock(&resv->lock);
 
-		list_for_each_entry_safe(rg, trg, &allocated_regions, link) {
-			list_del(&rg->link);
-			list_add(&rg->link, &resv->region_cache);
-			resv->region_cache_count++;
-		}
+		list_splice(&allocated_regions, &resv->region_cache);
+		resv->region_cache_count += to_allocate;
 	}
 
 	return 0;