On Fri, Nov 15, 2019 at 06:40:31PM +0100, Michal Hocko wrote: > I am sorry but I do not follow. How can css_tryget_online provide the > same semantic when the css can go offline right after the tryget call > returns so it is effectivelly undistinguishable from the case when the > css was already online before the call was made. Or is my understanding > of what Roman's said earlier in the thread? It's *exactly* the same semantics as opening a file and deleting it and keeping using it vs. deleting a file and then trying to open it. You can't give out a new reference when the entity's visibility is expected to be gone already and that's the exactly the condition that tryget_online avoids. I don't know how to better explain it if the file analogy doesn't work. Thanks. -- tejun
