Meeting Minutes

IRC Log of the meeting.

Meeting minutes.

Agenda

20120612 Meeting Agenda


ARM Status

Q/omap4: no new code was committed since last week, kept working on the configuration (delta reduction against master).


Release Metrics and Incoming Bugs

Release metrics and incoming bug data can be reviewed at the following link:

http://people.canonical.com/~kernel/reports/kt-meeting.txt


Milestone Targeted Work Items

If your name is in the above table, please review your Alpha-2 work
items.

   apw    hardware-q-kernel-config-review    4 work item   
      hardware-q-kernel-delta-review    3 work items   
      hardware-q-kernel-versions-and-flavors    1 work item   
   cking    hardware-q-kernel-delta-review    2 work items   
   cooloney    hardware-q-kernel-config-review    1 work item   
   jjohansen    hardware-q-kernel-config-review    1 work item   
   jk-    hardware-q-kernel-config-review    2 work items   
   ogasawara    hardware-q-kernel-config-review    2 work items   
   cyphermox    hardware-q-kernel-delta-review    1 work item   
   ppisati    hardware-q-kernel-config-review    1 work item   
   sforshee    hardware-q-kernel-delta-review    1 work item   
   smb    hardware-q-kernel-delta-review    1 work item   
      hardware-q-kernel-versions-and-flavors    1 work item   
   tgardner    hardware-q-kernel-config-review    2 work items   
      hardware-q-kernel-delta-review    2 work items   
   tlei    hardware-q-kernel-delta-review    2 work items   
   kernel-team    hardware-q-kernel-config-review    3 work items   
      hardware-q-kernel-versions-and-flavors    2 work items   


Status: Quantal Development Kernel

We have recently rebased the Quantal kernel to the latest v3.5-rc2
upstream kernel. I’d like to see a little more smoke testing before
uploading.
We’ve also began providing the 12.10 kernel for 12.04. We welcome any
early adopters to please install, test, and let us know your feedback.
It is available from the following PPA:

https://launchpad.net/~ubuntu-x-swat/+archive/q-lts-backport

Important upcoming dates:

  • Thurs Jun 28 – Alpha 2 (~2 weeks)


Status: Stable, Security, and Bugfix Kernel Updates – Precise/Oneiric/Natty/Lucid/Hardy

Here is the status for the main kernels, until today (June 05):

  • Hardy – 2.6.24-31.102 – Being prepared; 2 CVEs
  • Lucid – 2.6.32-41.91 – Being prepared; 2 CVEs
  • Natty – 2.6.38-15.61 – Being prepared; 3 CVEs
  • Oneiric – 3.0.0-22.36 – Being prepared; 1 upstream stable release (approx. 60 commits), 1 CVE
  • Precise – 3.2.0-26.41 – Being prepared; 1 upstream stable release (approx. 137 commits)

    Current opened tracking bugs details:

  • http://people.canonical.com/~kernel/reports/kernel-sru-workflow.html

    For SRUs, SRU report is a good source of information:

  • http://people.canonical.com/~kernel/reports/sru-report.html

    Future stable cadence cycles:

  • https://wiki.ubuntu.com/QuantalQuetzal/ReleaseInterlock


Status: CVE’s

== 2012-06-12 (weekly) ==
Currently we have 89 CVEs on our radar, with 0 new CVEs added this week.
See the CVE matrix for the current list:

http://people.canonical.com/~kernel/cve/pkg/ALL-linux.html

There is no change in the backlog this week:

http://people.canonical.com/~kernel/status/cve-metrics.txt

http://people.canonical.com/~kernel/cve/pkg/CVE-linux.txt


Open Discussion or Questions? Raise your hand to be recognized

kamal:
I’ve recently been working with the upstream Bufferbloat group: http://www.bufferbloat.net …
They have implemented new network scheduler algorithms designed to address the performance drag induced by large unmanaged network buffers. The new stuff (“fq_codel” and “codel”) just landed in linux 3.5.
A good article about the bufferbloat problem and the new scheduling algo’s is here: http://queue.acm.org/detail.cfm?id=2209336
The result is *very* impressive: I see a 30X reduction in ping latency on a fully saturated 10Mbps network, just by switching on the new fq_codel scheduler.
For an interactive ssh session over that same saturated 10Mbps network, fq_codel totally eliminates the laggy keyboard response — it feels like there’s no other network traffic at all!
I have produced a Bufferbloat PPA to allow us to experiment with this stuff now in Precise and Quantal:

https://launchpad.net/~kamalmostafa/+archive/bufferbloat

The PPA includes a “quantal-3.4-plus-bufferbloat” kernel for precise and quantal. (The new schedulers won’t work on pre-3.3 kernels). The PPA page links to a quick how-to-smoke-test-it guide and more info.
The Bufferbloat group is eager for testing and feedback and general eyeball time from the Ubuntu kernel team and the Ubuntu community. Their channel is #bufferbloat on freenode.
Please give my PPA a whirl, and get a taste of the new cutting-edge network goodness. Any questions about it — I’ll at least know who to direct you to, so feel free to ask me.

BenC:
I had this on the meeting agenda, but don’t see it above.
Trying to get some feedback for the patches I sent to kernel-team@, hoping to get it merged for next kernel upload
Re: PowerPC e500mc
BenC, i think that are being reviewed at the moment arn’t they ?
If so, I’m unaware :)
Also, if there are any suggestions on changes to my workflow for getting powerpc stuff merged, let me know
we are looking at them and seeing if they scare us or not
bjf: The only scary one(s) are the mdio phy changes, but I have tested them extensively on non-ppc
BenC: just got back after 5 days off. they are on my todo list.
Everything else is either nop or segmented on non-ppc
tgardner: thanks
a lot of the patches are sauce, are those also heading upstream ?
All of them have been pushed upstream
2 have been accepted
BenC: I should have some comments by tomorrow. got a huge pile of email to deal with…
Oh wait, not the SAUCE, not yet
freescale had 360+ patches last year, so they’ve done a lot to get this merged upstream
These are the last few, and are being dealt with in the coming months
tgardner: ok, please email, ping me if any questions come up…
will do
Anything else for open discussion?
Thanks everyone