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[Launchpad Bug Tracker <1347008@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

** Changed in: linux (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1347008

Title:
  Call trace and “TCP: out of memory… consider tuning tcp_mem”

Status in linux package in Ubuntu:
  Expired

Bug description:
  The install on a remote machine was upgraded to the trusty-lts kernel
  as stated in the HWE instructions. There is a bridge (br0) configured
  with the Ethernet interface (eth0) through the interfaces(5)
  configuration. After a couple of hours the machine would only respond
  to ICMP queries and connections with all services running on TCP ports
  could not be established. Therefore, a hard reboot was issued.
  Attached is the contents of /var/log/kern.log, post-reboot, with what
  seems to be relevant information (call trace, kernel message with
  “TCP: out of memory… consider tuning tcp_mem”, etc) around the
  relevant timespan. Inbound services running on TCP ports being
  inaccessible was first noticed around 02:30 (the machine's time). This
  matches up with the first “out of memory” message.

  The machine is running precise 12.04.4:

  valdearg@blair:~$ uname -a;dpkg -l linux-generic-lts-trusty linux-image-3.13.0-32-generic;grep 'LTS' /etc/lsb-release;lspci|grep Ether 
  Linux blair 3.13.0-32-generic #57~precise1-Ubuntu SMP Tue Jul 15 03:51:20 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
  Desired=Unknown/Install/Remove/Purge/Hold
  | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
  |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
  ||/ Name                                 Version                              Description
  +++-====================================-====================================-========================================================================================
  ii  linux-generic-lts-trusty             3.13.0.32.28                         Generic Linux kernel image and headers
  ii  linux-image-3.13.0-32-generic        3.13.0-32.57~precise1                Linux kernel image for version 3.13.0 on 64 bit x86 SMP
  DISTRIB_DESCRIPTION="Ubuntu 12.04.4 LTS"
  04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 06)

  
  This incident might be related to these bug reports:
  https://bugzilla.kernel.org/show_bug.cgi?id=77481
  https://lists.debian.org/debian-kernel/2014/04/msg00184.html

  Please let me know if there is anything else I can provide.

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