On Fri, Sep 06, 2024 at 10:02:00AM GMT, Petr Vorel wrote: > Hi Martin, all, > > [ Cc Kent and Bcachefs ML ] > > > The default deallocation size is likely too small for bcachefs > > to actually release the blocks. Since it is also a copy-on-write > > filesystem, deallocated the whole file like on Btrfs. > > Make sense. > Reviewed-by: Petr Vorel <[email protected]>
I haven't looked at this specific test, but one thing that we run into with the weird CoW behaviour tests in xfstests is that bcachefs btree nodes are 256k by default - you're going to see weird effects from that if tests are looking at disk usage.
