@zwol @regehr while I sort of agree with parts of that, I wanted to point out that disabling memory overcommit *also* invokes a regulatory system without enough context: the allocator. Whether two programs can succeed now depends on their execution interleaving of their map requests, and the decision to fail must be made even earlier (at the time of mapping). So while I agree it's often an improvement, it doesn't totally fix the issue I was describing.