Re: [PATCH v2] mm: process_mrelease: introduce PROCESS_MRELEASE_REAP_KILL flag

[Andrew Morton]

On Thu, 30 Apr 2026 17:32:40 +0200 Michal Hocko <mhocko@xxxxxxxx> wrote:

> On Thu 30-04-26 07:43:05, Andrew Morton wrote:
> > On Wed, 29 Apr 2026 14:13:59 -0700 Minchan Kim <minchan@xxxxxxxxxx> wrote:
> > 
> > > Currently, process_mrelease() requires userspace to send a SIGKILL signal
> > > prior to invocation. This separation introduces a scheduling race window
> > > where the victim task may receive the signal and enter the exit path
> > > before the reaper can invoke process_mrelease().
> > 
> > Does process_mrelease() have a manpage?  My googling was a fail.
> 
> It does. Very well hidden in 884a7e5964e06


Well, that didn't appear to make it into the manpages project and it
doesn't describe the expected usage: need to kill the process first. 
But I guess all the needed info is in
tools/testing/selftests/mm/mrelease_test.c.

https://lwn.net/Articles/864184/ is useful.