Re: [PATCH 0/2] mm: memory-failure: fix HWPoison flag race with non-atomic page flag ops

[Andi Kleen]

> We can maybe batch a bunch of these, and do stop machine once?

If you add a long delay you increase the risk that the machine or
the critical process dies because there is an unrecoverable or
process killing AR access before the page can be off lined.

(BTW that's a problem even with the RCU approach, the cure might be
worse than the disease)

If you don't add a long delay you would do a lot of stop machines
on a flood, likely bringing it to a halt, even though other sockets etc.
might still be fine.

-Andi