netdev - Re: [PATCH net-next] ipv4/fib: send RTM

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Date: Mon, 7 Aug 2023 19:44:38 -0600
From: David Ahern <dsahern@...nel.org>
To: Thomas Haller <thaller@...hat.com>, nicolas.dichtel@...nd.com,
 Stephen Hemminger <stephen@...workplumber.org>,
 Hangbin Liu <liuhangbin@...il.com>
Cc: Ido Schimmel <idosch@...sch.org>, netdev@...r.kernel.org,
 "David S . Miller" <davem@...emloft.net>, Eric Dumazet
 <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>
Subject: Re: [PATCH net-next] ipv4/fib: send RTM_DELROUTE notify when flush
 fib

On 8/2/23 3:10 AM, Thomas Haller wrote:
> On Fri, 2023-07-28 at 09:42 -0600, David Ahern wrote:
>> On 7/28/23 7:01 AM, Nicolas Dichtel wrote:
>>
>>> Managing a cache with this is not so obvious 😉
>>
>>
>> FRR works well with Linux at this point, 
> 
> Interesting. Do you have a bit more information?
> 
>> and libnl's caching was updated
>> ad fixed by folks from Cumulus Networks so it should be a good too.
> 
> 
> Which "libnl" do you mean?

yes. https://github.com/thom311/libnl.git

> 
> Route caching in libnl3 upstream is very broken (which I am to blame
> for, as I am the maintainer).
> 

as someone who sent in patches it worked for all of Cumulus' uses cases
around 2018-2019 time frame. Can't speak for the status today.