Re: [PATCH] generic/224: Increase filesystem instance size to 1.5 GiB

Theodore Ts'o
2015-09-01T02:15:16Z

On Tue, Sep 01, 2015 at 05:49:14AM +0530, Chandan Rajendra wrote:
> mkfs.btrfs when invoked on small filesystems by "not" specifying any block
> sizes (i.e. mkfs.btrfs -f /dev/sda1) will automatically create filesystem
> instance with "data block size" == "metadata block size". However in the
> subpagesize-blocksize scenario, we need to specify both data and metadata
> block size on the command line (For e.g. mkfs.btrfs -f -s 4096 -n 16384
> /dev/sda1). In this case, Since the user is forcing the block sizes and it is
> impossible to have mixed block groups with differing data and metadata block
> sizes, mkfs.btrfs will fail.

Ok, so the issue is that for this particular test configuration, btrfs
has a minimum file system size. What about changing
_scratch_mkfs_sized so that if MIN_FS_SIZE is set, the file system
created will be at least MIN_FS_SIZE in size.

This way it sets the minimum file system size for all tests, not just
generic/224, and any test configuration, whether it be ext4, xfs, or
btrfs where the data and metadata block size are the same, don't have
to take extra time -- only the test configuration of btrfs with
data_block_size != metadata_block_size.

Cheers,

- Ted