On Thu, Sep 24, 2020 at 05:21:12PM +0200, Uladzislau Rezki wrote: > On Thu, Sep 24, 2020 at 01:19:07PM +0200, Peter Zijlstra wrote: > > On Thu, Sep 24, 2020 at 10:16:14AM +0200, Uladzislau Rezki wrote: > > > The key point is "enough". We need pages to make a) fast progress b) support > > > single argument of kvfree_rcu(one_arg). Not vice versa. That "enough" depends > > > on scheduler latency and vague pre-allocated number of pages, it might > > > be not enough what would require to refill it more and more or we can overshoot > > > that would lead to memory overhead. So we have here timing issues and > > > not accurate model. IMHO. > > > > I'm firmly opposed to the single argument kvfree_rcu() idea, that's > > requiring memory to free memory. > > > Hmm.. The problem is there is a demand in it: People demand ponies all the time, the usual answer is: No.
