On Mon 28-06-21 18:40:02, Uladzislau Rezki wrote:

Also another option can be:

if a pcp list is fully consumed, so a refilling is required to proceed with array
populating, leave atomic section(enable irq), do a breath by invoking cond_resched()?

I do not know. I would rather not medle with the pcp batches. It is a hot
path and caller can decide the fallback mechanism.
-- 
Michal Hocko
SUSE Labs