netdev - Re: [net-next V5 PATCH 1/5] bpf: introduce new bpf cpu map type BPF_MAP_TYPE

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Message-ID: <59DB7C33.9090702@iogearbox.net>
Date:   Mon, 09 Oct 2017 15:40:03 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Jesper Dangaard Brouer <brouer@...hat.com>, netdev@...r.kernel.org
CC:     jakub.kicinski@...ronome.com,
        "Michael S. Tsirkin" <mst@...hat.com>, pavel.odintsov@...il.com,
        Jason Wang <jasowang@...hat.com>, mchan@...adcom.com,
        John Fastabend <john.fastabend@...il.com>,
        peter.waskiewicz.jr@...el.com,
        Daniel Borkmann <borkmann@...earbox.net>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Andy Gospodarek <andy@...yhouse.net>
Subject: Re: [net-next V5 PATCH 1/5] bpf: introduce new bpf cpu map type BPF_MAP_TYPE_CPUMAP

On 10/09/2017 03:31 PM, Daniel Borkmann wrote:
> On 10/06/2017 06:12 PM, Jesper Dangaard Brouer wrote:
[...]
>> +    /* Pre-limit array size based on NR_CPUS, not final CPU check */
>> +    if (cmap->map.max_entries > NR_CPUS)
>
> Nit: needs to be >= NR_CPUS.

Scratch that comment, you bail out on key_cpu >= cmap->map.max_entries
in the other handlers, so that's fine.