On Sat, 20 Jun 2020 00:57:19 +0200
Lorenzo Bianconi <lore...@kernel.org> wrote:
> As it has been already done for devmap, introduce 'struct bpf_cpumap_val'
> to formalize the expected values that can be passed in for a CPUMAP.
> Update cpumap code to use the struct.
>
> Signed-off-by: Lorenzo Bianconi <lore...@kernel.org>
> ---
> include/uapi/linux/bpf.h | 9 +++++++++
> kernel/bpf/cpumap.c | 25 +++++++++++++------------
> tools/include/uapi/linux/bpf.h | 9 +++++++++
> 3 files changed, 31 insertions(+), 12 deletions(-)
>
> diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
> index 19684813faae..a45d61bc886e 100644
> --- a/include/uapi/linux/bpf.h
> +++ b/include/uapi/linux/bpf.h
> @@ -3774,6 +3774,15 @@ struct bpf_devmap_val {
> } bpf_prog;
> };
>
> +/* CPUMAP map-value layout
> + *
> + * The struct data-layout of map-value is a configuration interface.
> + * New members can only be added to the end of this structure.
> + */
> +struct bpf_cpumap_val {
> + __u32 qsize; /* queue size */
> +};
> +
Nitpicking the comment: /* queue size */
It doesn't provide much information to the end-user.
What about changing it to: /* queue size to remote target CPU */
?
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Principal Kernel Engineer at Red Hat
LinkedIn: http://www.linkedin.com/in/brouer
