The VMA lock is used to prevent high-granularity HugeTLB mappings from being collapsed while other threads are doing high-granularity page table walks. Signed-off-by: James Houghton <jthoughton@xxxxxxxxxx> --- mm/rmap.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/rmap.c b/mm/rmap.c index 19850d955aea..527463c1e936 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -47,7 +47,8 @@ * * hugetlbfs PageHuge() take locks in this order: * hugetlb_fault_mutex (hugetlbfs specific page fault mutex) - * vma_lock (hugetlb specific lock for pmd_sharing) + * vma_lock (hugetlb specific lock for pmd_sharing and high-granularity + * mapping) * mapping->i_mmap_rwsem (also used for hugetlb pmd sharing) * page->flags PG_locked (lock_page) */ -- 2.38.0.135.g90850a2211-goog
