[Intel-gfx] [PATCH] RFT mm/oomkill: Don't skip the reaper

[Chris Wilson]

Quoting Chris Wilson (2018-05-29 10:55:28)
> If we find a task that has already been selected for reaping, consider
> that it may still free some memory. Currently, we skip such tasks
> believing that we've already extracted as memory free pages as possible
> from before hitting a livelock. In practice, at least on single user
> systems deliberating exercising oom, such processes have only begun to
> recover their pages and are still the worst hogs on the system. If we
> skip them, we just select yet more victims, and with sufficient
> enthusiasm may end up with all available processes marked for reaping,
> panicking in the process.
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Michał Winiarski <michal.winiarski at intel.com>

I've stuck this in this topic/core-for-CI for further testing and so we
can make some progress on the mlock failures in igt.
-Chris