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 <[email protected]> Reviewed-by: Baoquan He <[email protected]> Reviewed-by: Mike Kravetz <[email protected]> --- mm/hugetlb.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) 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; -- 2.20.1 (Apple Git-117)
