On 09/01/2026 11:32 am, Jan Beulich wrote: >>> Or is this when very many CPUs >>> try to do the same in parallel? >> The scenario is reboot of a VM when Xapi is doing NUMA placement using >> per-node claims. >> >> In this case, even with sufficient scrubbed RAM on other nodes, you need >> to take from the node you claimed on which might need scrubbing. > Much like if there was an exact-node request without involving claims. > >> The underlying problem is the need to do a long running operation in a >> context where you cannot continue, and cannot (reasonably) fail. > Right.
Yeah - I think this is a scenario that could happen without NUMA aspects, if the system is almost full. I suspect we've just made it easier to hit, or we've got better testing. Hard to say. ~Andrew
