> >> 1. How far does this push pages (in terms of when limit is hit)? > > > > 32 pages per mem_cgroup_shrink_node_zone(). > > > > That said, the algorithm is here. > > > > 1. call mem_cgroup_largest_soft_limit_node() > > calculate largest cgroup > > 2. call mem_cgroup_shrink_node_zone() and shrink 32 pages > > 3. goto 1 if limit is still exceed. > > > > If it's not your intention, can you please your intended algorithm? > > We set it to 0, since we care only about a single page reclaim on > hitting the limit. IIRC, in the past we saw an excessive pushback on > reclaiming SWAP_CLUSTER_MAX pages, just wanted to check if you are > seeing the same behaviour even now after your changes. Actually, we have 32 pages reclaim batch size. (see nr_scan_try_batch() and related functions) thus <32 value doesn't works as your intended. But, If you run your test again, and (if there is) report any bugs. I'm very glad and fix it soon. Thanks. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href