Re: [RFC]: userspace memory reaping

[Michal Hocko]

On Tue 03-11-20 13:32:28, Minchan Kim wrote:
> On Tue, Nov 03, 2020 at 10:35:50AM +0100, Michal Hocko wrote:
> > On Mon 02-11-20 12:29:24, Suren Baghdasaryan wrote:
> > [...]
> > > To follow up on this. Should I post an RFC implementing SIGKILL_SYNC
> > > which in addition to sending a kill signal would also reap the
> > > victim's mm in the context of the caller? Maybe having some code will
> > > get the discussion moving forward?
> > 
> > Yeah, having a code, even preliminary, might help here. This definitely
> > needs a good to go from process management people as that proper is land
> > full of surprises...
> 
> Just to remind a idea I suggested to reuse existing concept
> 
>     fd = pidfd_open(victim process)
>     fdatasync(fd);
>     close(fd);

I must have missed this proposal. Anyway, are you suggesting fdatasync
to act as a destructive operation?

-- 
Michal Hocko
SUSE Labs