>If it's true, then there could be 2 solutions, one is to skip the WARN_ONCE as it has no practical value, as the real >check is the following code, the other is to rectify the percpu counter when the policy is changing to >OVERCOMMIT_NEVER. I think it's better to fix it up when the policy changes. That's the right place. The WARN_ON might be useful to catch other bugs. -Andi