On Thu, Apr 19, 2018 at 06:04:26PM +0300, Thomas Backlund wrote: >Den 19.04.2018 kl. 16:59, skrev Greg KH: >>Anyway, we are trying not to do this, but it does, and will, >>occasionally happen. Look, we just did that for one platform for >>4.9.94! And the key to all of this is good testing, which we are now >>doing, and hopefully you are also doing as well. > >Yeah, but having to test stuff with known breakages is no fun, so we >try to avoid that Known breakages are easier to deal with than unknown ones :) I think that that "bug compatability" is basically a policy on *which* regressions you'll see vs *if* you'll see a regression. We'll never pull in a commit that introduces a bug but doesn't fix another one, right? So if you have to deal with a regression anyway, might as well deal with a regression that is also seen on mainline, so that when you upgrade your stable kernel you'll keep the same set of regressions to deal with.