Re: Re: [PATCH net-next v2 3/3] sock: Fix improper heuristic on raising memory

[Abel Wu]

On 10/19/23 4:53 PM, Paolo Abeni Wrote:
> On Mon, 2023-10-16 at 21:28 +0800, Abel Wu wrote:
> > Before sockets became aware of net-memcg's memory pressure since
> > commit e1aab161e013 ("socket: initial cgroup code."), the memory
> > usage would be granted to raise if below average even when under
> > protocol's pressure. This provides fairness among the sockets of
> > same protocol.
> >
> > That commit changes this because the heuristic will also be
> > effective when only memcg is under pressure which makes no sense.
> > Fix this by reverting to the behavior before that commit.
> >
> > After this fix, __sk_mem_raise_allocated() no longer considers
> > memcg's pressure. As memcgs are isolated from each other w.r.t.
> > memory accounting, consuming one's budget won't affect others.
> > So except the places where buffer sizes are needed to be tuned,
> > allow workloads to use the memory they are provisioned.
> >
> > Fixes: e1aab161e013 ("socket: initial cgroup code.")
>
> I think it's better to drop this fixes tag. This is a functional change
> and with such tag on at this point of the cycle, will land soon into
> every stable tree. That feels not appropriate.
>
> Please repost without such tag, thanks!
>
> You can send the change to stables trees later, if needed.

OK. Shall I add a Acked-by tag for you?

Thanks!
	Abel