On Tue, Aug 21, 2018 at 09:37:56AM -0500, Brijesh Singh wrote: > Those variables are accessed immediately by the tsc calibration code > path hence we will not able to delay the allocation. If you mean, check_tsc_sync_source/_target(), those are called pretty late, AFAICT. And I see a setup_arch() -> init_mem_mapping -> ... -> kernel_physical_mapping_init() call which happens much earlier. Again, AFAICT. You probably should try it though, to make sure. -- Regards/Gruss, Boris. SUSE Linux GmbH, GF: Felix Imendörffer, Jane Smithard, Graham Norton, HRB 21284 (AG Nürnberg) --