[CRIU] [PATCH 2/2] x86: restore -- Allow to restore fpu even if image is incomatible with cpu state

[Cyrill Gorcunov]

Sometime, especially when testing, we migrate checkpointed tasks between
nodes which have different CPU capabilities. In particular some CPUs have
xsave feature while others -- do not. So to be able to continue migration
procedure even in such conditions we introducing --fpu-mode option which
would force criu to restore FPU state ignoring extended status present in
image files.

This feature is pretty dangerous and should not be used until you really
know what you're doing.

Signed-off-by: Cyrill Gorcunov <gorcunov at openvz.org>
---
 Documentation/criu.txt |  9 +++++++++
 arch/x86/crtools.c     | 16 ++++++++++++----
 crtools.c              | 23 +++++++++++++++++++++++
 include/cr_options.h   |  9 +++++++++
 4 files changed, 53 insertions(+), 4 deletions(-)

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