netdev - Re: [PATCH net-next 2/4] tools: ynl: allow setting recv() size

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Message-ID: <20240304082002.14b3a081@kernel.org>
Date: Mon, 4 Mar 2024 08:20:02 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Donald Hunter <donald.hunter@...il.com>
Cc: davem@...emloft.net, netdev@...r.kernel.org, edumazet@...gle.com,
 pabeni@...hat.com, jiri@...nulli.us
Subject: Re: [PATCH net-next 2/4] tools: ynl: allow setting recv() size

On Mon, 4 Mar 2024 15:57:57 +0000 Donald Hunter wrote:
> > Attributes, not messages, right? But large messages are relatively
> > rare, this is to make dump use fewer syscalls. Dump can give us multiple
> > message on each recv().  
> 
> I did mean messages:

That's kernel capping the allocations to 32kB, using larger allocations
is "costly" / likely to fail on production systems. Technically the
family can overrule that setting, and my recollection was that 128k or
64k was what iproute2 uses.. I could be wrong.