netdev - Re: [QUESTION] potential issue - unusual drops on XL710 (40gbit) cards with ksoftirqd hogging one of cpus near 100%

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Date: Mon, 23 Oct 2023 09:55:45 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Michal Soltys <msoltyspl@...dex.pl>
Cc: netdev@...r.kernel.org, Rafał Golcz <rgl@...k.pl>, Piotr
 Przybylski <ppr@...k.pl>
Subject: Re: [QUESTION] potential issue - unusual drops on XL710 (40gbit)
 cards with ksoftirqd hogging one of cpus near 100%

On Mon, 23 Oct 2023 15:59:09 +0200 Michal Soltys wrote:
> - aggressively reclaimed page cache - up to ~200 GB memory is reclaimed 
> and immediately start filling up again with the data normally served by 
> those servers

I'd start from figuring out why this happens.
It may very well be a change / bug in memory management.