netdev - Re: [PATCH net-next 0/9] net: Kernel side filtering for route dumps

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Message-ID: <20181011161023.GA11906@oracle.com>
Date:   Thu, 11 Oct 2018 12:10:23 -0400
From:   Sowmini Varadhan <sowmini.varadhan@...cle.com>
To:     David Ahern <dsahern@...il.com>
Cc:     Stephen Hemminger <stephen@...workplumber.org>,
        David Ahern <dsahern@...nel.org>, netdev@...r.kernel.org,
        davem@...emloft.net
Subject: Re: [PATCH net-next 0/9] net: Kernel side filtering for route dumps

On (10/11/18 09:32), David Ahern wrote:
> 
> Route dumps are done for the entire FIB for each address family. As we
> approach internet routing tables (700k+ routes for IPv4, currently
> around 55k for IPv6) with many VRFs dumping the entire table is grossly
> inefficient when for example only a single VRF table is wanted.

I think someone mentioned a long time ago that a VRF is not an 
interface/driver/net_device but rather a separate routing table with a
dedicated set of interfaces, iirc :-) :-)

In the latter model, if you wanted to dump a VRF table, you'd only
lock that table, and walk it, instead of holding up other VRFS 

sorry, could not resist my i-told-you-so moment :-P

--Sowmini