kernel-packages team mailing list archive

[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

I built a Wily test kernel with a cherry-pick of commit 88c9281a.  It
can be downloaded from:

http://kernel.ubuntu.com/~jsalisbury/lp1498206/wily

Can this kernel be tested to confirm it resolves this bug?  If it does,
I can also built Vivid and Trusty test kernels.

Thanks in advance!

** Also affects: linux (Ubuntu Wily)
   Importance: High
       Status: Triaged

** Also affects: linux (Ubuntu Vivid)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Trusty)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu Vivid)
       Status: New => Triaged

** Changed in: linux (Ubuntu Trusty)
       Status: New => Triaged

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

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

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

** Changed in: linux (Ubuntu Trusty)
     Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

** Changed in: linux (Ubuntu Vivid)
     Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

** Changed in: linux (Ubuntu Wily)
     Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

** Changed in: linux (Ubuntu Wily)
       Status: Triaged => In Progress

** Changed in: linux (Ubuntu Vivid)
       Status: Triaged => In Progress

** Changed in: linux (Ubuntu Trusty)
       Status: Triaged => In Progress

** Tags added: trusty vivid wily

-- 
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/1498206

Title:
  Fix CPU lockup on Hyper-V/Azure

Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  Fix Committed

Bug description:
  Description of problem:
  Large sized VMs with 32 VCPUs and more than 100G memory sometimes hang at boot, and the console keeps printing logs like "soft lockup - CPU#14 stuck for 23s!"

  This particular issue can be resolved with the following patch upstream: 
  https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/arch/x86/kernel/cpu?id=88c9281a9fba67636ab26c1fd6afbc78a632374f

  Repro rate is low.  To repro, provision a larger VM (i.e. G5 VM on
  Azure) and reboot many times, monitoring the console until the "soft
  lockup - CPU" error is seen.

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