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[sodabrew <1291113@xxxxxxxxxxxxxxxxxx>]

Could you describe your symptoms more specifically to make sure that you
actually have _this_ bug?

Per my comment #1, do you see the same issue here (and can you post your
output):

"""
With no other major CPU usage, but CPU 0 pegged, "perf top" shows this as the top usage:

50.02% [kernel] [k] tasklet_action
23.48% [kernel] [k] __do_softirq
 5.66% [kernel] [k] __raise_softirq_irqoff
"""

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https://bugs.launchpad.net/bugs/1291113

Title:
  Intel igb driver infinite loop in ksoftirqd, uses 100% of cpu 0

Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux-lts-raring” package in Ubuntu:
  Invalid
Status in “linux” source package in Precise:
  Fix Released
Status in “linux-lts-raring” source package in Precise:
  Fix Released
Status in “linux” source package in Quantal:
  Fix Released
Status in “linux-lts-raring” source package in Quantal:
  Invalid
Status in “linux” source package in Trusty:
  Fix Released
Status in “linux-lts-raring” source package in Trusty:
  Invalid

Bug description:
  This bug is present in 3.11.0-17 and 3.11.0-18:

  https://lkml.org/lkml/2014/2/19/658

  The afflicted network interface's lspci output:

  02:00.0 Ethernet controller: Intel Corporation I350 Gigabit Network Connection (rev 01)
  	Subsystem: Super Micro Computer Inc Device 1521
  	Flags: bus master, fast devsel, latency 0, IRQ 27
  	Memory at df920000 (32-bit, non-prefetchable) [size=128K]
  	I/O ports at 8020 [size=32]
  	Memory at df944000 (32-bit, non-prefetchable) [size=16K]
  	Capabilities: [40] Power Management version 3
  	Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+
  	Capabilities: [70] MSI-X: Enable+ Count=10 Masked-
  	Capabilities: [a0] Express Endpoint, MSI 00
  	Capabilities: [100] Advanced Error Reporting
  	Capabilities: [140] Device Serial Number 00-xx-xx-xx-xx-xx-xx-xx
  	Capabilities: [150] Alternative Routing-ID Interpretation (ARI)
  	Capabilities: [160] Single Root I/O Virtualization (SR-IOV)
  	Capabilities: [1a0] Transaction Processing Hints
  	Capabilities: [1c0] Latency Tolerance Reporting
  	Capabilities: [1d0] Access Control Services
  	Kernel driver in use: igb
  	Kernel modules: igb

  [I have masked out the MAC address]

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