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    Subject[PATCH v2 0/2] Tracking user space vDSO remaping
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    CRIU is recreating the process memory layout by remapping the checkpointee
    memory area on top of the current process (criu). This includes remapping
    the vDSO to the place it has at checkpoint time.

    However some architectures like powerpc are keeping a reference to the vDSO
    base address to build the signal return stack frame by calling the vDSO
    sigreturn service. So once the vDSO has been moved, this reference is no
    more valid and the signal frame built later are not usable.

    This patch serie is introducing a new mm hook 'arch_remap' which is called
    when mremap is done and the mm lock still hold. The next patch is adding the
    vDSO remap and unmap tracking to the powerpc architecture.

    Changes in v2:
    --------------
    - Following the Ingo Molnar's advice, enabling the call to arch_remap through
    the __HAVE_ARCH_REMAP macro. This reduces considerably the first patch.

    Laurent Dufour (2):
    mm: Introducing arch_remap hook
    powerpc/mm: Tracking vDSO remap

    arch/powerpc/include/asm/mmu_context.h | 36 +++++++++++++++++++++++++++++++++-
    mm/mremap.c | 11 +++++++++--
    2 files changed, 44 insertions(+), 3 deletions(-)

    --
    1.9.1



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