netdev - Re: [PATCH net-next v5] rtnetlink: Support fine-grained netdevice bulk deletion

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Message-ID: <20211207073715.386e3f42@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Tue, 7 Dec 2021 07:37:15 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     David Ahern <dsahern@...il.com>
Cc:     Lahav Schlesinger <lschlesinger@...venets.com>,
        netdev@...r.kernel.org, nikolay@...dia.com
Subject: Re: [PATCH net-next v5] rtnetlink: Support fine-grained netdevice
 bulk deletion

On Mon, 6 Dec 2021 21:12:33 -0700 David Ahern wrote:
> The need to walk the list twice (3 really with the sort) to means the
> array solution is better.

Technically the linear walk will be dwarfed by the sort for non-trivial
inputs (have I been conducting too many coding interviews?) 

Especially with retpolines :(

> I liked the array variant better. Jakub?

I always default to attr-per-member unless there is a strong constraint
on message size. Trying to extend old school netlink (TC etc) left me
scarred. But we can do array, no big deal.