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Date: Fri, 25 Apr 2025 09:03:50 -1000
From: Tejun Heo <tj@kernel.org>
To: Harry Yoo <harry.yoo@oracle.com>
Cc: Vlastimil Babka <vbabka@suse.cz>, Christoph Lameter <cl@gentwo.org>,
	David Rientjes <rientjes@google.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Dennis Zhou <dennis@kernel.org>, Mateusz Guzik <mjguzik@gmail.com>,
	Jamal Hadi Salim <jhs@mojatatu.com>,
	Cong Wang <xiyou.wangcong@gmail.com>, Jiri Pirko <jiri@resnulli.us>,
	Vlad Buslov <vladbu@nvidia.com>,
	Yevgeny Kliteynik <kliteyn@nvidia.com>, Jan Kara <jack@suse.cz>,
	Byungchul Park <byungchul@sk.com>, linux-mm@kvack.org,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH 0/7] Reviving the slab destructor to tackle the
 percpu allocator scalability problem
Message-ID: <aAvcltpVFqRmcfM5@slm.duckdns.org>
References: <20250424080755.272925-1-harry.yoo@oracle.com>
 <aAqHKWU2xFk2X2ZD@slm.duckdns.org>
 <aAtfe1-ncE_oxt9H@harry>
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In-Reply-To: <aAtfe1-ncE_oxt9H@harry>

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