On Mon, Dec 06, 2021 at 04:13:00PM -0800, Linus Torvalds wrote: > IOW, I think that "try_get_page()" function is basically the *much* > superior version of what is currently a broken "refcount_inc()". > > And yes, it does warn about that overflow case that you claim only > refcount_t does. And does so without the broken semantics that > refcount h as. That places the burden of the unlikely overflow case on the user. Now every driver author needs to consider the overflow case and have a corresponding error path. How many bugs will that introduce? Why is saturation; iow. leaking the memory, a worse option than having bad/broken/never-tested error paths all over the kernel?
