[LTP] [PATCH v2] Use real FS block size in fallocate05

[Jan Stancek]

----- Original Message -----
> On 12/18/19 10:09 AM, Martin Doucha wrote:
> > On 12/17/19 10:02 PM, Jan Stancek wrote:
> >> Is there an upstream thread link for that btrfs bug?
> > 
> > Not yet. I've reported the bug to SUSE Bugzilla for now so that our
> > kernel devs can take a closer look. But they may still decide that this
> > is expected behavior.
> 
> Update: Our kernel devs just said that this is expected behavior. Btrfs
> will only release disk space when you deallocate a whole file extent
> that can be up to 128MB in size. I'll have to add an exception for Btrfs
> to fallocate05 then. Or would you guys prefer to always deallocate the
> whole file before the last write() check?

Since it's expected to work on other file systems, I'd add exception
only for btrfs.