On Thu, Nov 12, 2015 at 06:41:23PM -0500, Johannes Weiner wrote: > When a cgroup currently breaches its socket memory limit, it enters > memory pressure mode for itself and its *ancestors*. This throttles > transmission in unrelated sibling and cousin subtrees that have > nothing to do with the breached limit. > > On the contrary, breaching a limit should make that group and its > *children* enter memory pressure mode. But this happens already, > albeit lazily: if an ancestor limit is breached, siblings will enter > memory pressure on their own once the next packet arrives for them. Hmm, we still call sk_prot->enter_memory_pressure, which might hurt a workload in the root cgroup AFAICS. Strange. You fix it in patch 8 though. > > So no additional hierarchy code is needed. Remove the bogus stuff. > > Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx> Reviewed-by: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx> -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>