linux-kernel - Re: [RFC PATCH v3 0/4] Node Weights and Weighted Interleave

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Message-ID: <ivhxexthtfums73nkko6yoy635h3cpetv4sqaemrmqd5pbhpq6@6zrizaoxgdwi>
Date:   Wed, 1 Nov 2023 15:01:22 +0100
From:   Michal Hocko <mhocko@...e.com>
To:     "Huang, Ying" <ying.huang@...el.com>
Cc:     Johannes Weiner <hannes@...xchg.org>,
        Gregory Price <gourry.memverge@...il.com>,
        linux-kernel@...r.kernel.org, linux-cxl@...r.kernel.org,
        linux-mm@...ck.org, akpm@...ux-foundation.org,
        aneesh.kumar@...ux.ibm.com, weixugc@...gle.com, apopple@...dia.com,
        tim.c.chen@...el.com, dave.hansen@...el.com, shy828301@...il.com,
        gregkh@...uxfoundation.org, rafael@...nel.org,
        Gregory Price <gregory.price@...verge.com>
Subject: Re: [RFC PATCH v3 0/4] Node Weights and Weighted Interleave

On Wed 01-11-23 10:21:47, Huang, Ying wrote:
> Michal Hocko <mhocko@...e.com> writes:
[...]
> > Well, I am not convinced about that TBH. Sure it is probably a good fit
> > for this specific CXL usecase but it just doesn't fit into many others I
> > can think of - e.g. proportional use of those tiers based on the
> > workload - you get what you pay for.
> 
> For "pay", per my understanding, we need some cgroup based
> per-memory-tier (or per-node) usage limit.  The following patchset is
> the first step for that.
> 
> https://lore.kernel.org/linux-mm/cover.1655242024.git.tim.c.chen@linux.intel.com/

Why do we need a sysfs interface if there are plans for cgroup API?

-- 
Michal Hocko
SUSE Labs