From: Baokun Li Since block device (See commit 3c20917120ce ("block/bdev: enable large folio support for large logical block sizes")) and page cache (See commit ab95d23bab220ef8 ("filemap: allocate mapping_min_order folios in the page cache")) has the ability to have a minimum order when allocating folio, and ext4 has supported large folio in commit 7ac67301e82f ("ext4: enable large folio for regular file"), now add support for block_size > PAGE_SIZE in ext4. set_blocksize() -> bdev_validate_blocksize() already validates the block size, so ext4_load_super() does not need to perform additional checks. Here we only need to add the FS_LBS bit to fs_flags. In addition, allocation failures for large folios may trigger warn_alloc() warnings. Therefore, as with XFS, mark this feature as experimental. Signed-off-by: Baokun Li Reviewed-by: Zhang Yi --- fs/ext4/super.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 6735152dd219..1fbbae5a0426 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -5074,6 +5074,9 @@ static int ext4_check_large_folio(struct super_block *sb) return -EINVAL; } + if (sb->s_blocksize > PAGE_SIZE) + ext4_msg(sb, KERN_NOTICE, "EXPERIMENTAL bs(%lu) > ps(%lu) enabled.", + sb->s_blocksize, PAGE_SIZE); return 0; } @@ -7453,7 +7456,8 @@ static struct file_system_type ext4_fs_type = { .init_fs_context = ext4_init_fs_context, .parameters = ext4_param_specs, .kill_sb = ext4_kill_sb, - .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP | FS_MGTIME, + .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP | FS_MGTIME | + FS_LBS, }; MODULE_ALIAS_FS("ext4"); -- 2.46.1