[OpenWrt-Devel] 18.06: Cherry pick mtu fix
jaapbuurman at gmail.com
Thu Jun 21 15:18:43 EDT 2018
Some very good points you are giving. Is there anyone able and willing
to cherry-pick these 3 commits to the 18.06 branch before the RC1
release is tagged tomorrow?
On Thu, Jun 21, 2018 at 10:27 AM Kevin Darbyshire-Bryant
<kevin at darbyshire-bryant.me.uk> wrote:
> > On 21 Jun 2018, at 08:13, Jaap Buurman <jaapbuurman at gmail.com> wrote:
> > Dear all,
> > The move to kernel 4.14 broke mtu settings larger than 1500 by
> > default, unless the correct mtu was explicitly specified. The
> > following commit fixes this for the mt7621 target:
> > https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=5da2c68d001ee44b15a58639ed03a0ebb6f68020
> > 1) Would it be possible for someone to cherry-pick this to the 18.06
> > branch, so that it can receive widespread testing in the upcoming
> > 18.06 RC1 release?
> Personally I’d also pick the preceding mtk driver commit "ec502cd3fe ramips: rename ethernet driver folder to the same one that upstream uses” for clarity & easier cherry-picks going forward for 18.06. And I’d be very strongly tempted to have 9a4253b81f ramips: improve ethernet driver performance with GRO/TSO as well…. which gets 18.06 into the same state as master for mtk eth drivers.
> > 2) From the commit's message I get the impression this isn't an issue
> > with just mt7621, but with all targets that are able to handle a mtu >
> > 1500. Is my impression correct in this regard, and is this something
> > that should be fixed before a 18.06 release? Changing mtu settings >
> > 1500 does sound like basic functionality for routers nowadays.
> It is dependent upon the driver setting a suitable max_mtu in the netdev structure *IF* it supports values greater than 1500.
> + if (IS_ENABLED(CONFIG_SOC_MT7621))
> + netdev->max_mtu = 2048;
> The version of driver included with kernel 4.14 at present is too dumb to understand >1500 mtu, which is why openwrt replaces it with a version that (now) does.
> That’s my opinion anyway :-)
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