Because we only can isolate a active page via isolate_huge_page() and hugetlbfs_fallocate() forget to mark it as active, we cannot isolate and migrate those pages. Fixes: 70c3547e36f5 (hugetlbfs: add hugetlbfs_fallocate()) Signed-off-by: Muchun Song <songmuchun@xxxxxxxxxxxxx> --- fs/hugetlbfs/inode.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index b5c109703daa..2aceb085d202 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -737,10 +737,11 @@ static long hugetlbfs_fallocate(struct file *file, int mode, loff_t offset, /* * unlock_page because locked by add_to_page_cache() - * page_put due to reference from alloc_huge_page() + * put_page() (which is in the putback_active_hugepage()) + * due to reference from alloc_huge_page() */ unlock_page(page); - put_page(page); + putback_active_hugepage(page); } if (!(mode & FALLOC_FL_KEEP_SIZE) && offset + len > inode->i_size) -- 2.11.0
