On Thu, 2 Jul 2026 at 09:11, Qu Wenruo <[email protected]> wrote: > 在 2026/7/2 16:35, Daniel Vacek 写道: > [...] > >> > >> A simple tree dump can always show which range is hole and which is > >> preallocated. > > > > Yeah, that's true. I'm curious how other FSes handle this. Let me see. > > Or do you know from the top of your head? > > Sorry, not familiar with other fscrypt implementation at all. > You may want to try to experiment on ext4 to see how it's implemented. > > I guess they do nothing special and just expose hole/prealloc info. > > As the other path would be always filling hole with zero filled regular > extents (before encryption), and disable preallocation completely. > That looks over-killed and may take a lot of extra space.
Well, rather filling the prealloc with the same zero-filled extent I guess. --nX
