On 27/02/2024 11:38 am, Dave Hansen wrote:
On 2/26/24 14:34, Huang, Kai wrote:
So I am trying to get the actual downside of doing per-cgroup reclaim or
the full reason that we choose global reclaim.
Take the most extreme example:
while (hit_global_sgx_limit())
reclaim_from_this(cgroup);
You eventually end up with all of 'cgroup's pages gone and handed out to
other users on the system who stole them all. Other users might cause
you to go over the global limit. *They* should be paying part of the
cost, not just you and your cgroup.
Yeah likely we will need another layer of logic to decide when to do
global reclaim. I agree that is downside and is unnecessary for this
patchset.
Thanks for the comments.
