Fw: [Bug 217640] New: 10G SFP+ and 1G Ethernet work at 100M on macchiatobin

Fw: [Bug 217640] New: 10G SFP+ and 1G Ethernet work at 100M on macchiatobin

[Stephen Hemminger]

Begin forwarded message:

Date: Thu, 06 Jul 2023 23:23:02 +0000
From: bugzilla-daemon@kernel.org
To: stephen@networkplumber.org
Subject: [Bug 217640] New: 10G SFP+ and 1G Ethernet work at 100M on macchiatobin


https://bugzilla.kernel.org/show_bug.cgi?id=217640

            Bug ID: 217640
           Summary: 10G SFP+ and 1G Ethernet work at 100M on macchiatobin
           Product: Networking
           Version: 2.5
          Hardware: All
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Other
          Assignee: stephen@networkplumber.org
          Reporter: alpha_one_x86@first-world.info
        Regression: No

Hi,
Since I upgrade linux kernel from 5.10.137 to 6.1.38 all my interface of
macchiatobin work at 100M (90 Mbits/sec detected by iperf)
ethtool detect the link at correct speed (10G for SFP+ and 1Gbps for ethernet)
What can be the regression?

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Re: Fw: [Bug 217640] New: 10G SFP+ and 1G Ethernet work at 100M on macchiatobin

[Andrew Lunn]

Adding Russell King.

       Andrew

On Fri, Jul 07, 2023 at 07:59:19AM -0700, Stephen Hemminger wrote:
> 
> 
> Begin forwarded message:
> 
> Date: Thu, 06 Jul 2023 23:23:02 +0000
> From: bugzilla-daemon@kernel.org
> To: stephen@networkplumber.org
> Subject: [Bug 217640] New: 10G SFP+ and 1G Ethernet work at 100M on macchiatobin
> 
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=217640
> 
>             Bug ID: 217640
>            Summary: 10G SFP+ and 1G Ethernet work at 100M on macchiatobin
>            Product: Networking
>            Version: 2.5
>           Hardware: All
>                 OS: Linux
>             Status: NEW
>           Severity: normal
>           Priority: P3
>          Component: Other
>           Assignee: stephen@networkplumber.org
>           Reporter: alpha_one_x86@first-world.info
>         Regression: No
> 
> Hi,
> Since I upgrade linux kernel from 5.10.137 to 6.1.38 all my interface of
> macchiatobin work at 100M (90 Mbits/sec detected by iperf)
> ethtool detect the link at correct speed (10G for SFP+ and 1Gbps for ethernet)
> What can be the regression?
> 
> -- 
> You may reply to this email to add a comment.
> 
> You are receiving this mail because:
> You are the assignee for the bug.
> 

Re: Fw: [Bug 217640] New: 10G SFP+ and 1G Ethernet work at 100M on macchiatobin

[Russell King (Oracle)]

On Sat, Jul 08, 2023 at 11:23:03PM +0200, Andrew Lunn wrote:
> Adding Russell King.
> 
>        Andrew
> 
> On Fri, Jul 07, 2023 at 07:59:19AM -0700, Stephen Hemminger wrote:
> > 
> > 
> > Begin forwarded message:
> > 
> > Date: Thu, 06 Jul 2023 23:23:02 +0000
> > From: bugzilla-daemon@kernel.org
> > To: stephen@networkplumber.org
> > Subject: [Bug 217640] New: 10G SFP+ and 1G Ethernet work at 100M on macchiatobin
> > 
> > 
> > https://bugzilla.kernel.org/show_bug.cgi?id=217640
> > 
> >             Bug ID: 217640
> >            Summary: 10G SFP+ and 1G Ethernet work at 100M on macchiatobin
> >            Product: Networking
> >            Version: 2.5
> >           Hardware: All
> >                 OS: Linux
> >             Status: NEW
> >           Severity: normal
> >           Priority: P3
> >          Component: Other
> >           Assignee: stephen@networkplumber.org
> >           Reporter: alpha_one_x86@first-world.info
> >         Regression: No
> > 
> > Hi,
> > Since I upgrade linux kernel from 5.10.137 to 6.1.38 all my interface of
> > macchiatobin work at 100M (90 Mbits/sec detected by iperf)
> > ethtool detect the link at correct speed (10G for SFP+ and 1Gbps for ethernet)
> > What can be the regression?

I'm on holiday at the moment, so don't expect fast or full replies.

If ethtool is stating the correct link speed, then it's not a SFP layer
or phylink layer bug.

I don't see any problem with mvpp2 between Armada 8040 hardware running
6.3.0 and 6.1.0 kernels - according to iperf3:

[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  1004 MBytes   842 Mbits/sec   46 sender
[  5]   0.00-10.00  sec  1001 MBytes   839 Mbits/sec      receiver

That's mcbin <-(copper)-> Clearfog Base <-(fibre)-> Clearfog gt-8k

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