From: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Date: Fri, 14 Feb 2020 14:39:17 +0100 > This is a follow up to the initial patch series which David posted a > while ago: > > https://lore.kernel.org/bpf/20191207.160357.828344895192682546.davem@xxxxxxxxxxxxx/ > > which was (while non-functional on RT) a good starting point for further > investigations. This looks really good after a cursory review, thanks for doing this week. I was personally unaware of the pre-allocation rules for MAPs used by tracing et al. And that definitely shapes how this should be handled.