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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

I built a Xenial test kernel with a pick of commit: 287922eb0b The test
kernel can be downloaded from:

http://kernel.ubuntu.com/~jsalisbury/lp1597908/

Can you test this kernel and see if it resolves this bug?

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https://bugs.launchpad.net/bugs/1597908

Title:
  linux-kernel: Freeing IRQ from IRQ context

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  It looks like the Ubuntu 16.04 took the nvme driver from 4.5 kernel,
  but is missing some critical block updates that it was depending on.
  Specifically this one moving the timeout handler to a work queue
  instead of a irq context timer task:

  https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit?id=287922eb0b186e2a5bf54fdd04b734c25c90035c

  This mismatch causes lots of warnings and errors during recovery from
  failure.

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