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[Bug 1500739] Re: CPU lockup on HP Proliant DL380 Gen9 servers


Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.3 kernel[0].

If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag:

Once testing of the upstream kernel is complete, please mark this bug as

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.3-rc3-unstable/

** Changed in: linux (Ubuntu)
   Importance: Undecided => High

** Tags added: kernel-da-key vivid

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  CPU lockup on HP Proliant DL380 Gen9 servers

Status in linux package in Ubuntu:

Bug description:
  Over the past 3-ish weeks we've had 3 seperate HP Proliant DL380 Gen9
  servers lock up with a similar looking cpu lockup bug.  All 3 of these
  servers are nova-compute nodes in an OpenStack cluster, with a
  reasonable amount of load on them.  The symptoms are the load shoots
  up into the hundreds, and ps stops returning.

  I've attached lspci -vnvn and 3 sets of syslog message traces that we
  grabbed on each of the 3 times it has crashed.

  $ cat /proc/version_signature 
  Ubuntu 3.16.0-49.65~14.04.1-generic 3.16.7-ckt15

  Please let us know if you need any further information.

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