netdev - Re: [RFC PATCH 0/7] Reviving the slab destructor to tackle the percpu allocator scalability problem

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Message-ID: <aAvcltpVFqRmcfM5@slm.duckdns.org>
Date: Fri, 25 Apr 2025 09:03:50 -1000
From: Tejun Heo <tj@...nel.org>
To: Harry Yoo <harry.yoo@...cle.com>
Cc: Vlastimil Babka <vbabka@...e.cz>, Christoph Lameter <cl@...two.org>,
	David Rientjes <rientjes@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dennis Zhou <dennis@...nel.org>, Mateusz Guzik <mjguzik@...il.com>,
	Jamal Hadi Salim <jhs@...atatu.com>,
	Cong Wang <xiyou.wangcong@...il.com>, Jiri Pirko <jiri@...nulli.us>,
	Vlad Buslov <vladbu@...dia.com>,
	Yevgeny Kliteynik <kliteyn@...dia.com>, Jan Kara <jack@...e.cz>,
	Byungchul Park <byungchul@...com>, linux-mm@...ck.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 0/7] Reviving the slab destructor to tackle the
 percpu allocator scalability problem

On Fri, Apr 25, 2025 at 07:10:03PM +0900, Harry Yoo wrote:
> > I don't exactly know what that should look like but maybe a
> > simplified version of sl*b serving power of two sizes should do or maybe it
> > needs to be smaller and more adaptive. We'd need to collect some data to
> > decide which way to go.
> 
> I'm not sure what kind of data we need — maybe allocation size distributions,
> or more profiling data on workloads that contend on percpu allocator's locks?

Oh yeah, mostly distributions of memory allocation sizes across different
systems and workloads.

Thanks.

-- 
tejun