Hello,
Peter, I noticed /proc/stat::procs_blocked going U64_MAX transiently once in
the blue moon without any other persistent issues. After looking at the code
with Rik for a bit, the culprit seems to be c6e7bd7afaeb ("sched/core:
Optimize ttwu() spinning on p->on_cpu") - it changed where ttwu dec's
nr_iowait and it looks like that can happen before the target task gets to
inc.Thanks. -- tejun
