From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net-next] tcp: guarantee forward progress in
 tcp_sendmsg()
Date: Tue, 03 May 2016 16:20:54 -0400 (EDT)
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From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Mon, 02 May 2016 21:49:25 -0700

> From: Eric Dumazet <edumazet@google.com>
> 
> Under high rx pressure, it is possible tcp_sendmsg() never has a
> chance to allocate an skb and loop forever as sk_flush_backlog()
> would always return true.
> 
> Fix this by calling sk_flush_backlog() only if one skb had been
> allocated and filled before last backlog check.
> 
> Fixes: d41a69f1d390 ("tcp: make tcp_sendmsg() aware of socket backlog")
> Signed-off-by: Eric Dumazet <edumazet@google.com>

Applied.