netdev - Re: [PATCH bpf-next v5 0/6] xdp: Add devmap

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Date:   Thu, 8 Aug 2019 22:05:16 +0200
From:   Jesper Dangaard Brouer <brouer@...hat.com>
To:     Y Song <ys114321@...il.com>
Cc:     Toke Høiland-Jørgensen <toke@...hat.com>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Network Development <netdev@...r.kernel.org>,
        David Miller <davem@...emloft.net>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Björn Töpel 
        <bjorn.topel@...il.com>, Yonghong Song <yhs@...com>,
        brouer@...hat.com
Subject: Re: [PATCH bpf-next v5 0/6] xdp: Add devmap_hash map type

On Thu, 8 Aug 2019 12:57:05 -0700
Y Song <ys114321@...il.com> wrote:

> On Thu, Aug 8, 2019 at 12:43 PM Toke Høiland-Jørgensen <toke@...hat.com> wrote:
> >
> > Alexei Starovoitov <alexei.starovoitov@...il.com> writes:
> >  
> > > On Fri, Jul 26, 2019 at 9:06 AM Toke Høiland-Jørgensen <toke@...hat.com> wrote:  
> > >>
> > >> This series adds a new map type, devmap_hash, that works like the existing
> > >> devmap type, but using a hash-based indexing scheme. This is useful for the use
> > >> case where a devmap is indexed by ifindex (for instance for use with the routing
> > >> table lookup helper). For this use case, the regular devmap needs to be sized
> > >> after the maximum ifindex number, not the number of devices in it. A hash-based
> > >> indexing scheme makes it possible to size the map after the number of devices it
> > >> should contain instead.
> > >>
> > >> This was previously part of my patch series that also turned the regular
> > >> bpf_redirect() helper into a map-based one; for this series I just pulled out
> > >> the patches that introduced the new map type.
> > >>
> > >> Changelog:
> > >>
> > >> v5:
> > >>
> > >> - Dynamically set the number of hash buckets by rounding up max_entries to the
> > >>   nearest power of two (mirroring the regular hashmap), as suggested by Jesper.  
> > >
> > > fyi I'm waiting for Jesper to review this new version.  
> >
> > Ping Jesper? :)  
> 
> Toke, the patch set has been merged to net-next.
> https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=d3406913561c322323ec2898cc58f55e79786be7
> 

Yes, and I did review this... :-)

-- 
Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Principal Kernel Engineer at Red Hat
  LinkedIn: http://www.linkedin.com/in/brouer