Messages in this thread Patch in this message | | | From | Wei Yang <> | Subject | [Patch v2 3/7] mm/hugetlb: use list_splice to merge two list at once | Date | Fri, 28 Aug 2020 11:32:38 +0800 |
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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 --git a/mm/hugetlb.c b/mm/hugetlb.c index f325839be617..cbe67428bf99 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -441,11 +441,8 @@ 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)
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