Re: Re: Re: Re: Re: Re: Re: [PATCH v1] sched/numa: add per-process numa_balancing

On 11/17/21 4:29 PM, Mel Gorman wrote:

It's a bit vague but if you wanted to put together the outline, I'd read
over it. Note that this was all in the context of trying to introduce an

Sorry, maybe I shouldn't propose new feature in this context.

API like

Disable/enable per-process numa balancing:
         prctl(PR_NUMA_BALANCING, PR_SET_NUMA_BALANCING, 0/1);

i.e. one that controlled both enabling and disabling. You also have
the option of introducing the NUMAB equivalent of PR_SET_THP_DISABLE --
an API that is explicitly about disabling *only*.

If those APIs are ok with you, I will send v2 soon.

1. prctl(PR_NUMA_BALANCING, PR_SET_THP_DISABLE);
2. prctl(PR_NUMA_BALANCING, PR_SET_THP_ENABLE);
3. prctl(PR_NUMA_BALANCING, PR_GET_THP);

IIUC, "THP" means "this process" or "the process".