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| author | Wei Yang <richard.weiyang@linux.alibaba.com> | 2020-10-14 02:56:27 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-14 04:38:34 +0300 |
| commit | d3ec7b6e09e512ba902b86bcca2c512fb06d492f (patch) | |
| tree | a2bdb6769f9288054c6750c0aff81642deaa60c3 /mm | |
| parent | a1ddc2e8250eb550733a3f257ea299a84492d8a7 (diff) | |
| download | linux-d3ec7b6e09e512ba902b86bcca2c512fb06d492f.tar.xz | |
mm/hugetlb: use list_splice to merge two list at once
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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Baoquan He <bhe@redhat.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Link: https://lkml.kernel.org/r/20200831022351.20916-4-richard.weiyang@linux.alibaba.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/hugetlb.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 39f86bbcb07e..13dc0a455400 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; |