Groups > linux.debian.bugs.dist > #814873

Bug#858125: e1000: ethernet interface hangs occasionally, kernel reports hang

From	"Bruce Momjian,,," <bruce@momjian.us>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#858125: e1000: ethernet interface hangs occasionally, kernel reports hang
Date	2017-03-23 04:50 +0100
Message-ID	<to1V7-4Sh-1@gated-at.bofh.it> (permalink)
References	(5 earlier) <tmvaV-4CV-1@gated-at.bofh.it> <tnygp-8eX-9@gated-at.bofh.it> <tnABB-1iQ-33@gated-at.bofh.it> <tnEvw-3Xg-19@gated-at.bofh.it> <tnEYy-4sn-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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On Tue, Mar 21, 2017 at 11:08:34PM -0400, Bruce Momjian,,, wrote:
> > The e1000e driver *does* have statistics for pause frames transmitted
> > and received (run: "ethtool -S eth0| grep flow_control").  If you log
> > these every second then it should be possible to see what happens
> > around the time the TX watchdog fires.  That could provide some clues
> > as to whether the NIC is behaving correctly.
> 
> OK, I am running this after setting flow control on/default on the
> switch and Debian, and rebooting:
> 
> 	daemon -- sh -c "while :; do date;ethtool -S eth0| grep flow_control;
> 	sleep 1;done > /root/ethtool"
> 
> I will report back with the relevant logging lines once it hangs again. 

OK, I have results of a hang after 24 hours of uptime.  The hangs are
listed here via dmesg -T:

	http://momjian.us/expire/eth0/dmesg.txt

showing the watchdog warning/hang/reset at 23:01 and port hang/reset at
23:10.

I have also produced the ethtool -S output every second for the entire
24-hour period, gziped, at:

	http://momjian.us/expire/eth0/ethtool.gz

You will see reception of a large number of rx_flow_control_xoff
messages about 50 minutes before the hangs, and just before the hangs.

-- 
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

+ As you are, so once was I.  As I am, so you will be. +
+                      Ancient Roman grave inscription +

Thread

Bug#858125: e1000: ethernet interface hangs occasionally, kernel reports hang Ben Hutchings <ben@decadent.org.uk> - 2017-03-18 22:10 +0100
  Bug#858125: e1000: ethernet interface hangs occasionally, kernel reports hang "Bruce Momjian,,," <bruce@momjian.us> - 2017-03-18 22:20 +0100
    Bug#858125: e1000: ethernet interface hangs occasionally, kernel reports hang Ben Hutchings <ben@decadent.org.uk> - 2017-03-18 23:10 +0100
      Bug#858125: e1000: ethernet interface hangs occasionally, kernel reports hang "Bruce Momjian,,," <bruce@momjian.us> - 2017-03-18 23:20 +0100
        Bug#858125: e1000: ethernet interface hangs occasionally, kernel reports hang "Bruce Momjian,,," <bruce@momjian.us> - 2017-03-18 23:40 +0100
          Bug#858125: e1000: ethernet interface hangs occasionally, kernel reports hang "Bruce Momjian,,," <bruce@momjian.us> - 2017-03-21 21:10 +0100
            Bug#858125: e1000: ethernet interface hangs occasionally, kernel reports hang "Bruce Momjian,,," <bruce@momjian.us> - 2017-03-21 23:40 +0100
              Bug#858125: e1000: ethernet interface hangs occasionally, kernel reports hang Ben Hutchings <ben@decadent.org.uk> - 2017-03-22 03:50 +0100
                Bug#858125: e1000: ethernet interface hangs occasionally, kernel reports hang "Bruce Momjian,,," <bruce@momjian.us> - 2017-03-22 04:20 +0100
                Bug#858125: e1000: ethernet interface hangs occasionally, kernel reports hang "Bruce Momjian,,," <bruce@momjian.us> - 2017-03-23 04:50 +0100
                Bug#858125: e1000: ethernet interface hangs occasionally, kernel reports hang "Bruce Momjian,,," <bruce@momjian.us> - 2017-03-23 20:30 +0100
                Bug#858125: e1000: ethernet interface hangs occasionally, kernel reports hang "Bruce Momjian,,," <bruce@momjian.us> - 2017-04-11 00:10 +0200
  Bug#858125: e1000: ethernet interface hangs occasionally, kernel reports hang "Bruce Momjian,,," <bruce@momjian.us> - 2017-03-18 23:00 +0100

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