Re: btrfs fallocate woes

Chris Mason
2010-01-14T19:20:35Z

On Thu, Jan 14, 2010 at 09:27:38AM -0800, Roland Dreier wrote:
>
> > if you run it on ext4, it will create a 4-byte file with "test" in it.
> > On btrfs, however, the file size would be 4096, and the remaining
> > space will be filled with zeroes.
>
> My fallocate man page says:
>
> Because allocation is done in block size chunks, fallocate() may
> allocate a larger range than that which was specified.
>
> so the btrfs behavior seems OK to me.
>
> You say this is a regression. What btrfs version behaved differently?

The file size should still be 4 bytes I think, even if we allocate 4096.

-chris