linux-kernel - Re: [RFC PATCH] mm: net: disable kswapd for high-order network buffer allocation

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Message-ID: <CAGsJ_4w-=MNAKyNk6hvAYMbi_tdiehM4dFtz3x0-V-0kCh83PQ@mail.gmail.com>
Date: Wed, 15 Oct 2025 04:28:17 +0800
From: Barry Song <21cnbao@...il.com>
To: Shakeel Butt <shakeel.butt@...ux.dev>
Cc: Eric Dumazet <edumazet@...gle.com>, Matthew Wilcox <willy@...radead.org>, netdev@...r.kernel.org, 
	linux-mm@...ck.org, linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Barry Song <v-songbaohua@...o.com>, Jonathan Corbet <corbet@....net>, 
	Kuniyuki Iwashima <kuniyu@...gle.com>, Paolo Abeni <pabeni@...hat.com>, 
	Willem de Bruijn <willemb@...gle.com>, "David S. Miller" <davem@...emloft.net>, 
	Jakub Kicinski <kuba@...nel.org>, Simon Horman <horms@...nel.org>, Vlastimil Babka <vbabka@...e.cz>, 
	Suren Baghdasaryan <surenb@...gle.com>, Michal Hocko <mhocko@...e.com>, 
	Brendan Jackman <jackmanb@...gle.com>, Johannes Weiner <hannes@...xchg.org>, Zi Yan <ziy@...dia.com>, 
	Yunsheng Lin <linyunsheng@...wei.com>, Huacai Zhou <zhouhuacai@...o.com>
Subject: Re: [RFC PATCH] mm: net: disable kswapd for high-order network buffer allocation

On Tue, Oct 14, 2025 at 10:38 PM Shakeel Butt <shakeel.butt@...ux.dev> wrote:

> >
> > It might be worth exploring these settings further, but I can’t quite see
> > their connection to high-order allocations,
>
> I don't think there is a connection between them. Is there a reason you
> are expecting a connection/relation between them?

Eric replied to my email about frequent high-order allocation requests,
suggesting that I might be missing some proper configurations for these
settings[1]. So I’m trying to understand whether these configurations affect
the frequency of high-order allocations.

[1] https://lore.kernel.org/linux-mm/pow5zt7dmo2wiydophoap6ntaycyjt2yrszo3ue7mg2hgnzcmv@oi3epbtyoufn/T/#m9b94a1c60452551496738e4e15235329f860d1f9

Thanks
Barry