On Thu, 2015-02-05 at 14:44 +0100, Michal Kazior wrote:
> Ok. I tried calling skb_orphan() right after I submit each Tx frame
> (similar to niu which does this in start_xmit):
>
> --- a/drivers/net/wireless/ath/ath10k/htt_tx.c
> +++ b/drivers/net/wireless/ath/ath10k/htt_tx.c
> @@ -564,6 +564,8 @@ int ath10k_htt_tx(struct ath10k_htt *htt, struct
> sk_buff *msdu)
> if (res)
> goto err_unmap_msdu;
>
> + skb_orphan(msdu);
> +
> return 0;
>
> err_unmap_msdu:
>
>
> Now, with {net/master + ath10k GRO + the above} I get 620mbps on a
> single flow (even better then before). Wow.
>
> Does this look ok/safe as a solution to you?
Not at all. This basically removes backpressure.
A single UDP socket can now blast packets regardless of SO_SNDBUF
limits.
This basically remove years of work trying to fix bufferbloat.
I still do not understand why increasing tcp_limit_output_bytes is not
working for you.
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