Re: [RFC]: userspace memory reaping

On Tue 03-11-20 13:32:28, Minchan Kim wrote:

On Tue, Nov 03, 2020 at 10:35:50AM +0100, Michal Hocko wrote:

quoted

On Mon 02-11-20 12:29:24, Suren Baghdasaryan wrote:
[...]

quoted

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