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From: Russell King - ARM Linux <>
To: Ezequiel Garcia <>
Cc:, David Miller <>,,
Subject: Re: [PATCH net 0/2] net: marvell: Fix highmem support on non-TSO path
Date: Wed, 21 Jan 2015 15:01:59 +0000	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

On Wed, Jan 21, 2015 at 09:54:08AM -0300, Ezequiel Garcia wrote:
> These two commits are fixes to the issue reported by Russell King on
> mv643xx_eth. Namely, the introduction of a regression by commit 69ad0dd7af22
> which removed the support for highmem skb fragments. The guilty commit
> introduced the assumption of fragment's payload being located in lowmem pages.

I do wonder whether 69ad0dd7af22 is the real culpret, or whether there is
some other change in the netdev layer that we're missing.  That commit is
in 3.16, but from what I remember, 3.17 works fine, it's 3.18 which fails.

> A similar pattern can be found in the original mvneta driver (in fact, the
> regression was introduced by copy-pasting the mvneta code).
> These fixes are for the non-TSO egress path in mvneta and mv643xx_eth drivers.
> The TSO path needs a more intrusive change, as the TSO API needs to be fixed
> (e.g. to make it work in skb fragments, instead of pointers to data).
> Russell, as I'm still unable to reproduce this, do you think you can
> give it a spin over there?

Sure - I think the only one I can test is mv643xx_eth, I don't think I
have any device which supports mv_neta.

The test scenario is for a NFS mount (the Marvell device as the NFS
client) over IPv6.

Initial testing looks good, I'll let it run for a while with various
builds on the NFS share (which iirc was one of the triggering


FTTC broadband for 0.8mile line: currently at 10.5Mbps down 400kbps up
according to

  parent reply	other threads:[~2015-01-21 15:02 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-21 12:54 [PATCH net 0/2] net: marvell: Fix highmem support on non-TSO path Ezequiel Garcia
2015-01-21 12:54 ` [PATCH 1/2] net: mvneta: Fix highmem support in the non-TSO egress path Ezequiel Garcia
2015-01-26 22:40   ` David Miller
2015-01-21 12:54 ` [PATCH 2/2] net: mv643xx_eth: Fix highmem support in " Ezequiel Garcia
2015-01-21 17:40   ` Russell King - ARM Linux
2015-01-21 23:34     ` Ezequiel Garcia
2015-01-22  0:11       ` Russell King - ARM Linux
2015-01-22 12:17         ` Ezequiel Garcia
2015-01-26 22:40   ` David Miller
2015-01-21 15:01 ` Russell King - ARM Linux [this message]
2015-01-22 18:41   ` [PATCH net 0/2] net: marvell: Fix highmem support on non-TSO path Dean Gehnert
2015-01-22 18:45     ` Ezequiel Garcia
2015-01-22 19:01       ` Dean Gehnert
2015-01-22 21:09     ` Russell King - ARM Linux
2015-01-22 21:27       ` Dean Gehnert
2015-01-22 21:49         ` Russell King - ARM Linux
2015-01-22 23:06           ` Russell King - ARM Linux
2015-01-22 23:09             ` Dean Gehnert
2015-01-22 23:08           ` Dean Gehnert

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