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From: "Björn Töpel" <bjorn.topel@gmail.com>
To: Jakub Kicinski <jakub.kicinski@netronome.com>
Cc: Netdev <netdev@vger.kernel.org>,
	"Alexei Starovoitov" <ast@kernel.org>,
	"Daniel Borkmann" <daniel@iogearbox.net>,
	"Björn Töpel" <bjorn.topel@intel.com>, bpf <bpf@vger.kernel.org>,
	"Magnus Karlsson" <magnus.karlsson@gmail.com>,
	"Karlsson, Magnus" <magnus.karlsson@intel.com>,
	"Fijalkowski, Maciej" <maciej.fijalkowski@intel.com>,
	"Jonathan Lemon" <jonathan.lemon@gmail.com>,
	"Toke Høiland-Jørgensen" <toke@redhat.com>
Subject: Re: [PATCH bpf-next v3 1/2] xsk: store struct xdp_sock as a flexible array member of the XSKMAP
Date: Mon, 28 Oct 2019 21:54:04 +0100	[thread overview]
Message-ID: <CAJ+HfNhoRy=mEw=qNRCYwjcn+cANb0wTO4kgs=iU4W0bvoPyVw@mail.gmail.com> (raw)
In-Reply-To: <20191028110056.17eea9fb@cakuba.hsd1.ca.comcast.net>

On Mon, 28 Oct 2019 at 19:01, Jakub Kicinski
<jakub.kicinski@netronome.com> wrote:
> On Fri, 25 Oct 2019 11:32:18 +0200, Björn Töpel wrote:
> > From: Björn Töpel <bjorn.topel@intel.com>
> >
> > Prior this commit, the array storing XDP socket instances were stored
> > in a separate allocated array of the XSKMAP. Now, we store the sockets
> > as a flexible array member in a similar fashion as the arraymap. Doing
> > so, we do less pointer chasing in the lookup.
> >
> > Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
> Damn, looks like I managed to reply to v2.

No worries! Thanks for taking a second look.

> I think the size maths may overflow on 32bit machines on the addition.

Ugh, right. Re-reading the older threads. Thanks for pointing this
out!I'll get back with a v4.


  reply	other threads:[~2019-10-28 20:54 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-25  9:32 [PATCH bpf-next v3 0/2] xsk: XSKMAP lookup improvements Björn Töpel
2019-10-25  9:32 ` [PATCH bpf-next v3 1/2] xsk: store struct xdp_sock as a flexible array member of the XSKMAP Björn Töpel
2019-10-25 18:18   ` Jonathan Lemon
2019-10-28 18:00   ` Jakub Kicinski
2019-10-28 20:54     ` Björn Töpel [this message]
2019-10-25  9:32 ` [PATCH bpf-next v3 2/2] bpf: implement map_gen_lookup() callback for XSKMAP Björn Töpel
2019-10-25 18:19   ` Jonathan Lemon

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