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    SubjectRe: [PATCH v3 1/2] x86_64,signal: Fix SS handling for signals delivered to 64-bit programs
    On Wed, Mar 18, 2015 at 1:02 PM, Oleg Nesterov <oleg@redhat.com> wrote:
    > On 03/18, Andrey Wagin wrote:
    >>
    >> This patch fixes the problem. Oleg, could you send this path in the
    >> criu maillist?
    >
    > Sure, will do.

    We still haven't answered one question: what's the kernel's position
    on ABI stability wrt CRIU? We clearly shouldn't make changes that
    break the principle of CRIU, but CRIU encodes so many tricky
    assumptions about the inner workings of the kernel that it's really
    tough to avoid breaking old CRIU versions.

    So... do we introduce somewhat nasty code into the kernel to keep old
    CRIU versions working, or do we require that users who want to restore
    onto new kernels use new CRIU?

    (It seems clear to me that CRIU should apply the patch regardless of
    what the kernel does. It will enable CRIU to work on the same class
    of programs that are fixed by the kernel change that started this
    thread.)

    --Andy


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