netdev - Re: [PATCH net-next 0/2] nexthop: sysctl to skip route notifications on nexthop changes

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Message-ID: <CAJieiUgkO5x71KDAVvcF1nhA7Du9RnHqxTtTSOOh9JMGehOuyg@mail.gmail.com>
Date:   Thu, 23 Apr 2020 12:46:10 -0700
From:   Roopa Prabhu <roopa@...ulusnetworks.com>
To:     David Ahern <dsahern@...il.com>
Cc:     David Miller <davem@...emloft.net>,
        netdev <netdev@...r.kernel.org>,
        Nikolay Aleksandrov <nikolay@...ulusnetworks.com>,
        Benjamin Poirier <bpoirier@...ulusnetworks.com>
Subject: Re: [PATCH net-next 0/2] nexthop: sysctl to skip route notifications
 on nexthop changes

On Thu, Apr 23, 2020 at 8:10 AM David Ahern <dsahern@...il.com> wrote:
>
> On 4/23/20 8:48 AM, Roopa Prabhu wrote:
> >
> >
> > On Wed, Apr 22, 2020, 10:21 PM Roopa Prabhu <roopa@...ulusnetworks.com
> > <mailto:roopa@...ulusnetworks.com>> wrote:
> >
> >     From: Roopa Prabhu <roopa@...ulusnetworks.com
> >     <mailto:roopa@...ulusnetworks.com>>
> >
> >     Route notifications on nexthop changes exists for backward
> >     compatibility. In systems which have moved to the new
> >     nexthop API, these route update notifications cancel
> >     the performance benefits provided by the new nexthop API.
> >     This patch adds a sysctl to disable these route notifications
> >
> >     We have discussed this before. Maybe its time ?
> >
> >     Roopa Prabhu (2):
> >       ipv4: add sysctl to skip route notify on nexthop changes
> >       ipv6: add sysctl to skip route notify on nexthop changes
> >
> >
> >
> > Will update the series with some self test results with sysctl on later
> > today. Expect v2
> >
>
> and I have some changes for you. :-)
>
> There's a bit more to a "all of the processes know about nexthops; give
> me best performance" switch. I will send you a starter patch - the one I
> used for the LPC 2019 talk.

okay, thanks. :) .