On Fri, 2022-03-04 at 14:03 +0000, Robin Murphy wrote: > > OK, so either there's a mystery bug where IOVAs somehow get freed on > offline CPUs, or the hotplug notifier isn't working correctly, or > you've > contrived a situation where alloc_iova_fast() is actually racing > against > iova_cpuhp_dead(). In the latter case, the solution is "don't do > that". > > This change should not be necessary. > > Thanks, > Robin. Hi Robin, You are right, kernel 5.15 already has this patch, but kernel 5.10 not contain. Thanks, Yunfei.
