Re: [External] Re: [RFC] proc: Add a new isolated /proc/pid/mempolicy type.

[Zhongkun He]

> [Cc linux-api - please do so for any patches making/updating
> kernel<->user interfaces]
>
>
> On Mon 26-09-22 17:10:33, hezhongkun wrote:
> > From: Zhongkun He <hezhongkun.hzk@xxxxxxxxxxxxx>
> >
> > /proc/pid/mempolicy can be used to check and adjust the userspace task's
> > mempolicy dynamically.In many case, the application and the control plane
> > are two separate systems. When the application is created, it doesn't know
> > how to use memory, and it doesn't care. The control plane will decide the
> > memory usage policy based on different reasons.In that case, we can
> > dynamically adjust the mempolicy using /proc/pid/mempolicy interface.
>
> Is there any reason to make it procfs interface rather than pidfd one?

Hi michal,  thanks for your reply.

I just think that it is easy to display and adjust the mempolicy using 
procfs. But it may not be suitable, I will send a pidfd_set_mempolicy 
patch later.

Btw.in order to add per-thread-group mempolicy, is it possible to add 
mempolicy in mm_struct?