netdev - Re: [PATCH] IPv6: Fix CPU contention on FIB6 GC

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Message-ID: <20200623220650.kymq7vbqiogvnsj3@lion.mk-sys.cz>
Date:   Wed, 24 Jun 2020 00:06:50 +0200
From:   Michal Kubecek <mkubecek@...e.cz>
To:     Oliver Herms <oliver.peter.herms@...il.com>
Cc:     Eric Dumazet <eric.dumazet@...il.com>, netdev@...r.kernel.org,
        davem@...emloft.net, kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org,
        kuba@...nel.org
Subject: Re: [PATCH] IPv6: Fix CPU contention on FIB6 GC

On Tue, Jun 23, 2020 at 01:30:29AM +0200, Oliver Herms wrote:
> 
> I'm encountering the issues due to cache entries that are created by 
> tnl_update_pmtu. However, I'm going to address that issue in another thread
> and patch.
> 
> As entries in the cache can be caused on many ways this should be fixed on the GC
> level.

Actually, not so many as starting with (IIRC) 4.2, IPv6 routing cache is
only used for exceptions (like PMTU), not for regular lookup results.

Michal