kernel-packages team mailing list archive

[Clark Boylan <clark.boylan@xxxxxxxxx>]

Couple of things. We get ext3 on these filesystems because that is what
Rackspace gives us. I have a hunch that if OpenStack (nova) were to
change its default fs to ext4 that in a week and a half we would start
seeing that in the nodes Rackspace gives us. But the first iteration of
that change got reverted so it will need to be sorted. 3.2 is a bit old
but we recently tried 3.11 (using the saucy precise kernel backport) and
that didn't fix the problem according to the comments above.

I do have a change (https://review.openstack.org/70283) that will mount
the ext3 filesystems we are given as ext4. We can see if that will help.
But really we have the ability to fix these problems as an upstream, we
should take advantage of that.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1273386

Title:
  Neutron namespace metadata proxy triggers kernel crash on Ubuntu
  12.04/3.2 kernel

Status in OpenStack Neutron (virtual network service):
  Triaged
Status in OpenStack Compute (Nova):
  New
Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  In the past 9 days we have been seeing very frequent occurences of
  this kernel crash: http://paste.openstack.org/show/61869/

  Even if the particular crash pasted here is triggered by dnsmasq, in
  almost all cases the crash is actually triggered by the neutron metada
  proxy.

  This also affects nova badly since this issue, which appears namespace
  related, results in a hang while mounting the ndb device for key
  injection.

  logstash query:
  http://logstash.openstack.org/#eyJzZWFyY2giOiJcImtlcm5lbCBCVUcgYXQgL2J1aWxkL2J1aWxkZC9saW51eC0zLjIuMC9mcy9idWZmZXIuYzoyOTE3XCIgYW5kIGZpbGVuYW1lOnN5c2xvZy50eHQiLCJmaWVsZHMiOltdLCJvZmZzZXQiOjAsInRpbWVmcmFtZSI6ImN1c3RvbSIsImdyYXBobW9kZSI6ImNvdW50IiwidGltZSI6eyJmcm9tIjoiMjAxNC0wMS0xNlQxODo1MDo0OCswMDowMCIsInRvIjoiMjAxNC0wMS0yN1QxOToxNjoxMSswMDowMCIsInVzZXJfaW50ZXJ2YWwiOiIwIn0sInN0YW1wIjoxMzkwODUwMzI2ODY0fQ==

  We have seen about 398 hits since the bug started to manifest.
  Decreased hit rate in the past few days is due to less neutron patches being pushed.

To manage notifications about this bug go to:
https://bugs.launchpad.net/neutron/+bug/1273386/+subscriptions