There might be swapin error entries in shmem mapping. Filter them out to avoid "Bad swap file entry" complaint. Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx> --- mm/madvise.c | 5 ++++- mm/swap_state.c | 3 +++ 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/mm/madvise.c b/mm/madvise.c index a42165bc4735..31582b6ff551 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -248,10 +248,13 @@ static void force_shm_swapin_readahead(struct vm_area_struct *vma, if (!xa_is_value(page)) continue; + swap = radix_to_swp_entry(page); + /* There might be swapin error entries in shmem mapping. */ + if (non_swap_entry(swap)) + continue; xas_pause(&xas); rcu_read_unlock(); - swap = radix_to_swp_entry(page); page = read_swap_cache_async(swap, GFP_HIGHUSER_MOVABLE, NULL, 0, false, &splug); if (page) diff --git a/mm/swap_state.c b/mm/swap_state.c index b9e4ed2e90bf..778d57d2d92d 100644 --- a/mm/swap_state.c +++ b/mm/swap_state.c @@ -410,6 +410,9 @@ struct page *find_get_incore_page(struct address_space *mapping, pgoff_t index) return NULL; swp = radix_to_swp_entry(page); + /* There might be swapin error entries in shmem mapping. */ + if (non_swap_entry(swp)) + return NULL; /* Prevent swapoff from happening to us */ si = get_swap_device(swp); if (!si) -- 2.23.0
