netdev - Re: [PATCH net-next 0/2] net: dsa: mv88e6xxx: Improve PTP access latency

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Date:   Fri, 16 Feb 2018 15:37:34 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     andrew@...n.ch
Cc:     netdev@...r.kernel.org, vivien.didelot@...oirfairelinux.com
Subject: Re: [PATCH net-next 0/2] net: dsa: mv88e6xxx: Improve PTP access
 latency

From: Andrew Lunn <andrew@...n.ch>
Date: Thu, 15 Feb 2018 14:38:33 +0100

> PTP needs to retrieve the hardware timestamps from the switch device
> in a low latency manor. However ethtool -S and bridge fdb show can
> hold the switch register access mutex for a long time. These patches
> changes the reading the statistics and the ATU so that the mutex is
> released and taken again between each statistic or ATU entry. The PTP
> code can then interleave its access to the hardware, keeping its
> latency low.

Series applied, thanks Andrew.