On Thu, Nov 11, 2021 at 05:50:03PM -0800, Josh Poimboeuf wrote: > Hm, I think there is actually a livepatch problem here. I suspected as much, because I couldn't find any code dealing with it when I looked in a hurry.. :/ > Some ideas to fix: > c) Update the reliable stacktrace code to mark the stack unreliable if > it has a function with ".cold" in the name? Why not simply match func.cold as func in the transition thing? Then func won't get patched as long as it (or it's .cold part) is in use. This seems like the natural thing to do. If there are enough .cold functions, always reporting stacktrace as unreliable will make progress hard, even though it might be perfectly safe. > e) Disable .cold optimization? Yeah, lets not do that. That'll have me lobbying to kill KLP again because it generates crap code.
