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From: David Miller <davem@davemloft.net>
To: eric@nelint.com
Cc: netdev@vger.kernel.org, linux@arm.linux.org.uk, andrew@lunn.ch,
	fugang.duan@nxp.com, otavio@ossystems.com.br,
	edumazet@google.com, troy.kisky@boundarydevices.com,
	u.kleine-koenig@pengutronix.de
Subject: Re: [PATCH 0/3] net: fec: updates to align IP header
Date: Tue, 27 Sep 2016 07:40:06 -0400 (EDT)	[thread overview]
Message-ID: <20160927.074006.1952862778935087880.davem@davemloft.net> (raw)
In-Reply-To: <1474728139-9335-1-git-send-email-eric@nelint.com>

From: Eric Nelson <eric@nelint.com>
Date: Sat, 24 Sep 2016 07:42:16 -0700

> This patch series is the outcome of investigation into very high
> numbers of alignment faults on kernel 4.1.33 from the linux-fslc
> tree:
>     https://github.com/freescale/linux-fslc/tree/4.1-1.0.x-imx
> 
> The first two patches remove support for the receive accelerator (RACC) from
> the i.MX25 and i.MX27 SoCs which don't support the function.
> 
> The third patch enables hardware alignment of the ethernet packet payload
> (and especially the IP header) to prevent alignment faults in the IP stack.
> 
> Testing on i.MX6UL on the 4.1.33 kernel showed that this patch removed
> on the order of 70k alignment faults during a 100MiB transfer using 
> wget.
> 
> Testing on an i.MX6Q (SABRE Lite) board on net-next (4.8.0-rc7) showed
> a much more modest improvement from 10's of faults, and it's not clear
> why that's the case.

Series applied and queued up for -stable.

  parent reply	other threads:[~2016-09-27 11:40 UTC|newest]

Thread overview: 55+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-23 16:43 Alignment issues with freescale FEC driver Eric Nelson
2016-09-23 16:43 ` Eric Nelson
2016-09-23 16:54 ` Eric Dumazet
2016-09-23 16:54   ` Eric Dumazet
2016-09-23 17:19   ` Eric Nelson
2016-09-23 17:19     ` Eric Nelson
2016-09-23 17:33     ` Eric Nelson
2016-09-23 17:33       ` Eric Nelson
2016-09-23 18:13       ` Andrew Lunn
2016-09-23 18:13         ` Andrew Lunn
2016-09-23 18:30         ` Russell King - ARM Linux
2016-09-23 18:30           ` Russell King - ARM Linux
2016-09-23 18:39           ` Eric Nelson
2016-09-23 18:39             ` Eric Nelson
2016-09-23 18:35         ` Eric Nelson
2016-09-23 18:35           ` Eric Nelson
2016-09-24  2:45           ` David Miller
2016-09-24  2:45             ` David Miller
2016-09-24  5:13             ` Andy Duan
2016-09-24  5:13               ` Andy Duan
2016-09-24 14:42               ` [PATCH 0/3] net: fec: updates to align IP header Eric Nelson
2016-09-24 14:42                 ` [PATCH 1/3] net: fec: remove QUIRK_HAS_RACC from i.mx25 Eric Nelson
2016-09-24 14:42                 ` [PATCH 2/3] net: fec: remove QUIRK_HAS_RACC from i.mx27 Eric Nelson
2016-09-24 14:42                 ` [PATCH 3/3] net: fec: align IP header in hardware Eric Nelson
2016-09-26  9:26                   ` David Laight
2016-09-26 18:39                     ` Eric Nelson
2016-09-28 16:42                       ` David Laight
2016-09-28 17:14                         ` Eric Nelson
2016-09-28 17:25                           ` Russell King - ARM Linux
2016-09-28 18:01                             ` Eric Nelson
2016-09-29 11:07                           ` David Laight
2016-09-30 13:27                             ` Eric Nelson
2016-09-30 13:49                               ` David Laight
2016-09-30 14:16                                 ` Eric Nelson
2016-10-01 19:52                                   ` Russell King - ARM Linux
2016-10-03 16:42                                     ` David Laight
2016-10-03 18:48                                     ` Eric Nelson
2016-10-08  2:44                               ` Andy Duan
2016-09-24 15:09                 ` [PATCH 0/3] net: fec: updates to align IP header Andy Duan
2016-09-24 15:29                   ` Eric Nelson
2016-09-27 11:40                 ` David Miller [this message]
2016-09-24  2:43       ` Alignment issues with freescale FEC driver David Miller
2016-09-24  2:43         ` David Miller
2016-09-24 12:27         ` Eric Nelson
2016-09-24 12:27           ` Eric Nelson
2016-09-23 17:37     ` Russell King - ARM Linux
2016-09-23 17:37       ` Russell King - ARM Linux
2016-09-23 18:26       ` Eric Nelson
2016-09-23 18:26         ` Eric Nelson
2016-09-23 18:37         ` Russell King - ARM Linux
2016-09-23 18:37           ` Russell King - ARM Linux
2016-09-23 18:49           ` Eric Nelson
2016-09-23 18:49             ` Eric Nelson
2016-09-23 20:22           ` Uwe Kleine-König
2016-09-23 20:22             ` Uwe Kleine-König

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