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.