FW: [PATCH] af_packet: flush complete kernel cache in packet_sendmsg

[chetan loke]

>
> This flushes the cache before and after accessing the mmapped packet
> buffer. It seems like the call to flush_dcache_page from inside
> __packet_get_status is not enough on Kirkwood (or ARM in general).



> +       kw_extra_cache_flush();
> +       rc = po->tx_ring.pg_vec ? tpacket_snd(po, msg) :
> +                       packet_snd(sock, msg, len);
> +       kw_extra_cache_flush();
> +       return rc;
>  }

If a workaround is needed for mmap, then why not change tpacket_snd?

Also, is this workaround actually working for all the cases? Because
packet_get_status is not being touched in your patch.

Also, I don't see any changes for the Rx-path. Is that working ok?


Chetan Loke