Poniżej zamieszczamy dwie odpowiedzi Linusa na liście dyskusyjnej:
I really am not ready to just remove ext3 without a lot of good arguments. There might well be people who this use ext3 as ext3, and don’t want to update. I want more a rationale for removal than “ext4 can read old ext3 filesystems”.
That’s not my only worry. Things like “can you go back to ext3-only” is an issue too – I don’t think that’s been a big priority for ext4 any more, and if there are any existing hold-outs that still use ext3, they may want to be able to go back to old kernels.
So it’s not just a “you can use ext4 instead” issue. Can you do that *without* then forcing an upgrade forever on that partition? I’m not sure the ext4 people are really even willing to guarantee that kind of backwards compatibility.
I could be ok with removing ext3 in theory, but I haven’t seen a lot of rationale for it, and I don’t know if there are still users who may have their own good reasons to stay with ext3. Maybe there has been lots of discussion about this on fsdevel (which I don’t follow), and I’m just lacking the background, but if so I want to see that background. Not just a oneliner description that basically says “remove ext3 support”.