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Andrei Vagin authored
Currently the vdso has no awareness of time namespaces, which may apply distinct offsets to processes in different namespaces. To handle this within the vdso, we'll need to expose a per-namespace data page. As a preparatory step, this patch separates the vdso data page from the code pages, and has it faulted in via its own fault callback. Subsquent patches will extend this to support distinct pages per time namespace. The vvar vma has to be installed with the VM_PFNMAP flag to handle faults via its vma fault callback. Signed-off-by:
Andrei Vagin <avagin@gmail.com> Reviewed-by:
Vincenzo Frascino <vincenzo.frascino@arm.com> Reviewed-by:
Dmitry Safonov <dima@arista.com> Link: https://lore.kernel.org/r/20200624083321.144975-2-avagin@gmail.comSigned-off-by:
Catalin Marinas <catalin.marinas@arm.com>
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