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

[Gang Li]

On 11/17/21 6:10 PM, Mel Gorman wrote:
> On Wed, Nov 17, 2021 at 05:38:28PM +0800, Gang Li wrote:
> > If those APIs are ok with you, I will send v2 soon.
> >
> > 1. prctl(PR_NUMA_BALANCING, PR_SET_THP_DISABLE);
>
> It would be (PR_SET_NUMAB_DISABLE, 1)
>
> > 2. prctl(PR_NUMA_BALANCING, PR_SET_THP_ENABLE);
>
> An enable prctl will have the same problems as
> prctl(PR_NUMA_BALANCING, PR_SET_NUMA_BALANCING, 0/1) -- it should have
> meaning if the numa_balancing sysctl is disabled.
>
> > 3. prctl(PR_NUMA_BALANCING, PR_GET_THP);
>
> PR_GET_NUMAB_DISABLE

How about this:

1. prctl(PR_NUMA_BALANCING, PR_SET_NUMAB_DEFAULT); //follow global
2. prctl(PR_NUMA_BALANCING, PR_SET_NUMAB_DISABLE); //disable
3. prctl(PR_NUMA_BALANCING, PR_SET_NUMAB_ENABLE);  //enable
4. prctl(PR_NUMA_BALANCING, PR_GET_NUMAB);

PR_SET_NUMAB_DISABLE/ENABLE can always have meaning whether the
numa_balancing sysctl is disabled or not,

--
Thanks,
Gang Li