[Buildah] Buildah image size

Hallo, I am building a rootless image using buildah from some base image. The resulting image size as shown by podman images is about 1.3Gb. When I run the image container size reported by podman inspect --size is also approximately the same. podman image tree shows 3 layers for this image and the sum of space, reported for all layers also matches image size. But when I run du -sh / inside the container, the size reported is just about 800Mb. Where the extra 0.5Gb has disappeared? While building the image I delete a lot of files from base image: can it be that even when the files are removed the space, used by them is not actually released? Best regards, -- \ / | | (OvO) | Михаил Иванов | (^^^) | | \^/ | E-mail: ivans(a)isle.spb.ru | ^ ^ | |