On Tue, Sep 20, 2022 at 10:54:32PM -0700, Sarthak Kukreti wrote: > [ mmc0blkp1 | ext4(1) | sparse file | loop | dm-thinp | dm-thin | ext4(2) ] > > would be predicated on the guarantees of fallocate() per allocation > layer; if ext4(1) was replaced by a filesystem that did not support > fallocate(), then there would be no guarantee that a write to a file > on ext4(2) succeeds. a write or any unlimited number of writes?
