Re: [RFC] mm: add new syscall pidfd_set_mempolicy()

On Wed 12-10-22 15:07:48, Michal Hocko wrote:

On Wed 12-10-22 07:34:06, Vinicius Petrucci wrote:

[...]

quoted

Having a feature like "pidfd/process_mbind" would really simplify our
user-level agent implementation moving forward, as right now we are
adding a LD_PRELOAD wrapper (for signal handler) to listen and execute
"mbind" requests from another process. If there's any other
alternative solution to this already (via ptrace?), please let me
know.

userfaultfd sounds like the closest match if #PF handling under control
of an external agent is viable.

And just to clarify. I haven't ever played with using userfaultfd for
numa balancing so I might be completely wrong here.
-- 
Michal Hocko
SUSE Labs