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[Bug 1438677] Re: dom0 kernel panic - xen_blkbk_unmap+0x5c/0x2f0 [xen_blkback]


Precisation: patch seems to be in linus tree (for version 3.20) at least
since 10 Feb 2015:


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  dom0 kernel panic - xen_blkbk_unmap+0x5c/0x2f0 [xen_blkback]

Status in linux package in Ubuntu:

Bug description:
  Current stable kernel is affected by an issue that happens when
  releasing grants. It is a communication issue between dom0 and domU
  and there is a temptative patch upstream (konrad's tree) that might
  fix the issue:

  (also in attachment)

  I have not been able to backport this patch on top of current
  3.13.0-48 sources.

  When this panic is triggered (on a server for example), there is a
  complete dom0 kernel crash (as documented by attachment log) with data
  & services loss.

  /proc/version_signature: Ubuntu 3.13.0-48.80-generic 3.13.11-ckt16

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