[Bug 1515145] Re: xm migrate --live panics hypervisor

[Philipp Hahn]

The first patch does not work!

The backport was quiet complicates as that patch is in the middle of
4) eca988d x86/mm: merge the shadow, hap and log-dirty locks into a single paging lock.
3) 5bf494a x86/mm: Make MM locks recursive.
2) 301493f x86/mm: dedup the various copies of the shadow lock functions
1) 3b0bcb8 x86/mm/p2m: Move p2m code in HVMOP_[gs]et_mem_access into p2m.c

2) and 4) are already in debian/patches/xsa97-hap-4.1-prereq.patch, so
the patch also contains the parts from eca988d which where skipped as
5bf494a was not back-ported.

This patch also requires a back-port of
3b0bcb890955e1c3e2fde10a026c5d85481e6fb8 (1) as compilation failes
otherwise - I'll attach that next - as an alternative it could be enough
to '#include "../mm-locks.h"' instead, but I didn't test that.

** Patch added: "Fixed patch v2"
   https://bugs.launchpad.net/ubuntu/+source/xen/+bug/1515145/+attachment/4619204/+files/0003-x86-mm-Make-MM-locks-recursive.patch

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Title:
  xm migrate --live panics hypervisor

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