I noticed that ecryptfs + ext4 doesn't support sparse files efficiently (it takes a long time to write to a large sparse file, as if it actually writes/encrypts

I noticed that ecryptfs + ext4 doesn't support sparse files efficiently (it takes a long time to write to a large sparse file, as if it actually writes/encrypts all the zeroes). Having encryption directly in ext4 should solve that, but I haven't tested the patchset yet.