> at least a couple years back, if you had a KVM guest with an ext4 filesystem in an image file, on an ext4 filesystem, the guest OS could corrupt the host OS.

> at least a couple years back, if you had a KVM guest with an ext4 filesystem in an image file, on an ext4 filesystem, the guest OS could corrupt the host OS. Your "alarming number of corruption bugs" is one bug from a couple of years back? ext4 is fairly well established now. A few years ago it might have been new enough that there were edge cases that needed investigation, but it's robust enough now. And there's a difference between a decent design having some bugs that can be fixed and a fundamentally broken design. Linus seems to be arguing that HFS+ is the latter. The problem with HFS+ is precisely that it needs to handle unicode in the filesystem because it needs to consider different names as the same. And, seemingly, it does it even worse than NFTS does.