On Wed, 15 Jul 2020, Josh Poimboeuf wrote:

On Wed, Jul 15, 2020 at 03:41:55PM +0200, Petr Mladek wrote:

quoted

On Wed 2020-07-15 14:10:54, Petr Mladek wrote:

quoted

On Wed 2020-07-15 13:11:14, Miroslav Benes wrote:

quoted

Petr, would you agree to revert -flive-patching.

Yes, I agree.

Or better to say that I will not block it.

I see that it causes maintenance burden. There are questions about
reliability and performance impact. I do not have a magic solution
in the pocket.

Anyway, we need a solution to know what functions need to get livepatched.
I do not have experience with comparing the assembly, so I do not know
how it is complicated and reliable.

Thanks Petr/Miroslav.  I can do the revert patch.  It doesn't have to be
a permanent revert.  I'd certainly be willing to ACK it again in the
future if/when it becomes more ready.

Ok.

Yannick has agreed to start looking at the objtool function diff
feature.  It's purely theoretical at the moment, we'll see how it works
in practice.  We already do something similar in kpatch-build -- it
differs from the objtool model, but it at least shows that something
similar is possible.

Great. I'm looking forward to seeing that.

Thanks
Miroslav