netdev - Re: [PATCH net-next] net: skb_segment() should preserve backpressure

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Date:	Tue, 28 Oct 2014 21:15:44 +0900
From:	Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
To:	Eric Dumazet <eric.dumazet@...il.com>,
	David Miller <davem@...emloft.net>
CC:	netdev@...r.kernel.org, Herbert Xu <herbert@...dor.apana.org.au>
Subject: Re: [PATCH net-next] net: skb_segment() should preserve backpressure

On 2014/10/28 2:30, Eric Dumazet wrote:
> From: Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
> 
> This patch generalizes commit d6a4a1041176 ("tcp: GSO should be TSQ
> friendly") to protocols using skb_set_owner_w()
> 
> TCP uses its own destructor (tcp_wfree) and needs a more complex scheme
> as explained in commit 6ff50cd55545 ("tcp: gso: do not generate out of
> order packets")
> 
> This allows UDP sockets using UFO to get proper backpressure,
> thus avoiding qdisc drops and excessive cpu usage.
> 
...
> [edumazet] Rewrote patch and changelog.

This looks better in performance.
I tested this patch and couldn't find any problem.

Thank you for your reviewing and suggesting,
Toshiaki Makita

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