linux-kernel - Re: stmmac ethernet in kernel 4.4: coalescing related pauses?

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Message-Id: <20161128.095431.856183735501262965.davem@davemloft.net>
Date:   Mon, 28 Nov 2016 09:54:31 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     lsanfil@...vell.com
Cc:     pavel@....cz, peppe.cavallaro@...com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: stmmac ethernet in kernel 4.4: coalescing related pauses?

From: Lino Sanfilippo <lsanfil@...vell.com>
Date: Mon, 28 Nov 2016 14:07:51 +0100

> Calling skb_orphan() in the xmit handler made this issue disappear.

This is not the way to handle this problem.

The solution is to free the SKBs in a timely manner after the
chip has transmitted the frame.