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SubjectPlease, put 64-bit counter per task and each ctxt switch.

We will need 64 bit counters of the slow context switches,
one counter for each new created task (e.g. u64 ctxt_switch_counts;)

We will only need them during the lifetime of the tasks.

To increment by +1 the task's 64 bit counter (it's fast)
each one slow context switch.

void context_switch(...) { ... } # incr. +1 here.
void wake_up_new_task(...) { ... } # ->ctxt_switch_counts = 0ULL;
struct task_struct { ... } # add 64-bit (u64 ctxt_switch_counts;) here.
Please, do it and we can do it better than CFS fair scheduler.

I will explain your later why of it.


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