> On Jan 14, 2020, at 4:02 PM, Michal Hocko <mhocko@xxxxxxxxxx> wrote: > > Yeah, that was a long discussion with a lot of lockdep false positives. > I believe I have made it clear that the console code shouldn't depend on > memory allocation because that is just too fragile. If that is not > possible for some reason then it has to be mentioned in the changelog. > I really do not want us to add kludges to the MM code just because of > printk deficiencies unless that is absolutely inevitable. I don’t know how to convince you, but both random number generator and printk() maintainers agreed to get ride of printk() with zone->lock held as you can see in the approved commit mentioned in this patch description because it is a whac-a-mole to fix other places. In other word, the patch alone fixes quite a few false positives and potential real deadlocks. Maybe Andrew please has a look at this directly?
