On 03/22/2019 01:50 PM, Christopher Lameter wrote: > On Fri, 22 Mar 2019, Waiman Long wrote: > >> I am looking forward to it. > There is also alrady rcu being used in these paths. kfree_rcu() would not > be enough? It is an estalished mechanism that is mature and well > understood. > In this case, the memory objects are from kmem caches, so they can't freed using kfree_rcu(). There are certainly overhead using the kfree_rcu(), or a kfree_rcu()-like mechanism. Also I think the actual freeing is done at SoftIRQ context which can be a problem if there are too many memory objects to free. I think what Oleg is trying to do is probably the most efficient way. Cheers, Longman
