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Bug#820622: linux-image-4.5.0-trunk-armmp-lpae: raspberry pi 2: smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped

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On Sun, 2016-04-10 at 11:15 -0700, Vagrant Cascadian wrote:
> Package: src:linux
> Version: 4.5-1~exp1
> Severity: normal
> 
> Thanks for enabling support for raspberry pi 2!

Thanks for confirming it works, because I was working without any
access to hardware.  I see you've updated flash-kernel to support it as
well.

> It works for the most part, but floods syslog with messages:
> 
> [501966.870273] net_ratelimit: 35702 callbacks suppressed
> [501966.875438] smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped
> 
> It seems to function ok, though I'm not sure if there's degraded
> network performance...
[...]

I understand network performance on all RPi models is poor due to lack
of a built-in Ethernet MAC and the poor design of the USB interface.
Also that message is a generic error message from the usbnet core and
is not specific to the smsc95xx driver.

Were you using the network heavily, or do these messages appear
regardless of the level of network traffic?

I checked the latest Raspbian kernel I could find
(,3.16.7-ckt11-1+deb8u4+rpi1) and they don't have any patches to that
driver (other than adding a module parameter for no good reason).

Ben.

-- 
Ben Hutchings
I'm always amazed by the number of people who take up solipsism because
they heard someone else explain it. - E*Borg on alt.fan.pratchett

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Bug#820622: linux-image-4.5.0-trunk-armmp-lpae: raspberry pi 2: smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped Vagrant Cascadian <vagrant@debian.org> - 2016-04-10 20:20 +0200
  Bug#820622: linux-image-4.5.0-trunk-armmp-lpae: raspberry pi 2: smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped Ben Hutchings <ben@decadent.org.uk> - 2016-04-10 21:20 +0200
    Bug#820622: linux-image-4.5.0-trunk-armmp-lpae: raspberry pi 2: smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped Vagrant Cascadian <vagrant@debian.org> - 2016-04-10 22:30 +0200
    Bug#820622: linux-image-4.5.0-trunk-armmp-lpae: raspberry pi 2:  smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped Diederik de Haas <didi.debian@cknow.org> - 2016-04-10 23:00 +0200
      Bug#820622: linux-image-4.5.0-trunk-armmp-lpae: raspberry pi 2:  smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped Ben Hutchings <ben@decadent.org.uk> - 2016-04-11 02:20 +0200
        Bug#820622: linux-image-4.5.0-trunk-armmp-lpae: raspberry pi 2:  smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped Vagrant Cascadian <vagrant@debian.org> - 2016-04-11 03:10 +0200
          Bug#820622: linux-image-4.5.0-trunk-armmp-lpae: raspberry pi 2:  smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped Vagrant Cascadian <vagrant@debian.org> - 2016-04-11 17:20 +0200
          Bug#820622: linux-image-4.5.0-trunk-armmp-lpae: raspberry pi 2:  smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped Vagrant Cascadian <vagrant@debian.org> - 2016-04-13 20:50 +0200
            Bug#820622: linux-image-4.5.0-trunk-armmp-lpae: raspberry pi 2:  smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped Ben Hutchings <ben@decadent.org.uk> - 2016-04-28 17:20 +0200
              Bug#820622: linux-image-4.5.0-trunk-armmp-lpae: raspberry pi 2:  smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped Diederik de Haas <didi.debian@cknow.org> - 2016-04-28 17:40 +0200
                Bug#820622: linux-image-4.5.0-trunk-armmp-lpae: raspberry pi 2:  smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped Ben Hutchings <ben@decadent.org.uk> - 2016-04-28 18:20 +0200
              Bug#820622: linux-image-4.5.0-trunk-armmp-lpae: raspberry pi 2:  smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped Vagrant Cascadian <vagrant@debian.org> - 2016-05-02 03:30 +0200
                Bug#820622: linux-image-4.5.0-trunk-armmp-lpae: raspberry pi 2:  smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped Ben Hutchings <ben@decadent.org.uk> - 2016-05-02 21:00 +0200
                Bug#820622: linux-image-4.5.0-trunk-armmp-lpae: raspberry pi 2:  smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped Vagrant Cascadian <vagrant@debian.org> - 2016-05-03 06:10 +0200
                Bug#820622: linux-image-4.5.0-trunk-armmp-lpae: raspberry pi 2:  smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped Vagrant Cascadian <vagrant@debian.org> - 2016-05-03 18:20 +0200
                Bug#820622: linux-image-4.5.0-trunk-armmp-lpae: raspberry pi 2:  smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped Ben Hutchings <ben@decadent.org.uk> - 2016-05-07 13:50 +0200
                Bug#820622: linux-image-4.5.0-trunk-armmp-lpae: raspberry pi 2:  smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped Diederik de Haas <didi.debian@cknow.org> - 2016-05-07 14:10 +0200
  Processed: Re: Bug#820622: linux-image-4.5.0-trunk-armmp-lpae:  raspberry pi 2: smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped owner@bugs.debian.org (Debian Bug Tracking System) - 2016-04-10 21:20 +0200
  Bug#820622: linux-image-4.5.0-trunk-armmp-lpae: raspberry pi 2: smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped Bjørn Mork <bjorn@mork.no> - 2016-04-11 10:20 +0200
    Bug#820622: linux-image-4.5.0-trunk-armmp-lpae: raspberry pi 2: smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped Ben Hutchings <ben@decadent.org.uk> - 2016-04-11 13:30 +0200
      Bug#820622: linux-image-4.5.0-trunk-armmp-lpae: raspberry pi 2: smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped Bjørn Mork <bjorn@mork.no> - 2016-04-11 15:10 +0200
  Processed: Re: Bug#820622: linux-image-4.5.0-trunk-armmp-lpae:  raspberry pi 2:  smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped owner@bugs.debian.org (Debian Bug Tracking System) - 2016-04-28 17:20 +0200
  Processed: Re: Bug#820622: linux-image-4.5.0-trunk-armmp-lpae:  raspberry pi 2:  smsc95xx 1-1.1:1.0 eth0: kevent 2 may have been dropped owner@bugs.debian.org (Debian Bug Tracking System) - 2016-05-02 03:30 +0200

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