Commit d3ec7b6e authored by Wei Yang's avatar Wei Yang Committed by Linus Torvalds

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: default avatarWei Yang <richard.weiyang@linux.alibaba.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Reviewed-by: default avatarBaoquan He <bhe@redhat.com>
Reviewed-by: default avatarMike Kravetz <mike.kravetz@oracle.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Link: https://lkml.kernel.org/r/20200831022351.20916-4-richard.weiyang@linux.alibaba.comSigned-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent a1ddc2e8
...@@ -443,11 +443,8 @@ static int allocate_file_region_entries(struct resv_map *resv, ...@@ -443,11 +443,8 @@ static int allocate_file_region_entries(struct resv_map *resv,
spin_lock(&resv->lock); spin_lock(&resv->lock);
list_for_each_entry_safe(rg, trg, &allocated_regions, link) { list_splice(&allocated_regions, &resv->region_cache);
list_del(&rg->link); resv->region_cache_count += to_allocate;
list_add(&rg->link, &resv->region_cache);
resv->region_cache_count++;
}
} }
return 0; return 0;
......
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