To support shmem large folio swapout in the following patches, using xa_get_order() to get the order of the swap entry to calculate the swap usage of shmem. Signed-off-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx> --- mm/shmem.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/mm/shmem.c b/mm/shmem.c index 74821a7031b8..bc099e8b9952 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -865,13 +865,16 @@ unsigned long shmem_partial_swap_usage(struct address_space *mapping, struct page *page; unsigned long swapped = 0; unsigned long max = end - 1; + int order; rcu_read_lock(); xas_for_each(&xas, page, max) { if (xas_retry(&xas, page)) continue; - if (xa_is_value(page)) - swapped++; + if (xa_is_value(page)) { + order = xa_get_order(xas.xa, xas.xa_index); + swapped += 1 << order; + } if (xas.xa_index == max) break; if (need_resched()) { -- 2.39.3