From: Jakub Kicinski <jakub.kicinski@netronome.com>
To: "Björn Töpel" <bjorn.topel@gmail.com>
Cc: ast@kernel.org, daniel@iogearbox.net, netdev@vger.kernel.org,
magnus.karlsson@intel.com, bjorn.topel@intel.com,
toke@redhat.com, brouer@redhat.com, bpf@vger.kernel.org,
saeedm@mellanox.com
Subject: Re: [PATCH bpf-next v3 0/5] net: xdp: refactor XDP program queries
Date: Mon, 10 Jun 2019 15:24:33 -0700 [thread overview]
Message-ID: <20190610152433.6e265d6c@cakuba.netronome.com> (raw)
In-Reply-To: <20190610160234.4070-1-bjorn.topel@gmail.com>
On Mon, 10 Jun 2019 18:02:29 +0200, Björn Töpel wrote:
> Jakub, what's your thoughts on the special handling of XDP offloading?
> Maybe it's just overkill? Just allocate space for the offloaded
> program regardless support or not? Also, please review the
> dev_xdp_support_offload() addition into the nfp code.
I'm not a huge fan of the new approach - it adds a conditional move,
dereference and a cache line reference to the fast path :(
I think it'd be fine to allocate entries for all 3 types, but the
potential of slowing down DRV may not be a good thing in a refactoring
series.
next prev parent reply other threads:[~2019-06-10 22:24 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-10 16:02 [PATCH bpf-next v3 0/5] net: xdp: refactor XDP program queries Björn Töpel
2019-06-10 16:02 ` [PATCH bpf-next v3 1/5] net: xdp: refactor XDP_QUERY_PROG{,_HW} to netdev Björn Töpel
2019-06-10 16:02 ` [PATCH bpf-next v3 2/5] nfp, netdevsim: use dev_xdp_support_offload() function Björn Töpel
2019-06-10 16:02 ` [PATCH bpf-next v3 3/5] net: xdp: remove XDP_QUERY_PROG{,_HW} Björn Töpel
2019-06-10 16:02 ` [PATCH bpf-next v3 4/5] net: xdp: refactor XDP flags checking Björn Töpel
2019-06-10 16:02 ` [PATCH bpf-next v3 5/5] net: xdp: remove xdp_attachment_flags_ok() and flags member Björn Töpel
2019-06-10 22:24 ` Jakub Kicinski [this message]
2019-06-11 7:24 ` [PATCH bpf-next v3 0/5] net: xdp: refactor XDP program queries Björn Töpel
2019-06-11 12:17 ` Toke Høiland-Jørgensen
2019-06-11 17:22 ` Jakub Kicinski
2019-06-12 5:38 ` Björn Töpel
2019-06-12 14:31 ` Jonathan Lemon
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