On Fri, Oct 26, 2018 at 1:42 PM Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote: > > On Fri, Oct 26, 2018 at 1:06 PM Nick Desaulniers > <ndesaulniers@xxxxxxxxxx> wrote: > > > > Is removing a filesystem considered a userspace breakage? > > Yes - if a user notices. > > The key word is *USER*. > > Note that it's not "user space". It's not about _programs_ noticing, > it's literally about users and their workflows. > > If some change breaks a real user workflow, it needs to be reverted. > > So this is not about ABI or anything like that. We've had cases where > the ABI stayed the same, but the order of device probing changed, and > that broke peoples setups (because now /dev/sdb and /dev/sda switched > places), and we had to revert. > > It's literally about "if a user upgrades a kernel, and something no > longer works, it's a regression". > > In general, a good idea is "if you have to wonder about it, just don't > do it". Because it turns out that users are odd, and often do odd > things much after you'd have thought they'd have long since switched > to more modern hardware or filesystems. > > Linus Makes sense and is a consistent stance. Thanks for clarifying. Will pursue the smaller fix in the other subthread. https://lkml.org/lkml/2018/10/27/55 -- Thanks, ~Nick Desaulniers
