Re: [PATCH 2/6] futex: Implement FUTEX2_NUMA

Christoph Lameter (Ampere)
2024-10-28T22:34:06Z

On Sun, 27 Oct 2024, Davidlohr Bueso wrote:

> On Fri, 25 Oct 2024, Christoph Lameter (Ampere) wrote:\n
>
> > Would it be possible to follow the NUMA memory policy set up for a task
> > when making these decisions? We may not need a separate FUTEX2_NUMA
> > option. There are supportive functions in mm/mempolicy.c that will yield
> > a node for the futex logic to use.
>
> With numa-awareness, when would lookups ever want to be anywhere but
> local? mempolicy is about allocations, futexes are not that.

futexes use kernel metadata right? Those allocations are controlled by
the tasks memory policy.