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And in talking about periodically, RMPOPT_WORK_TIMEOUT is not used anywhere. > > What's up? RMPOPT_WORK_TIMEOUT is used by snp_rmpopt_all_physmem() (mod_delayed_work()), which is added in the next patch — I'll move the define there so each patch is self-contained. It isn't periodic either: the handler doesn't re-arm itself. The work runs at setup and re-init with queue_delayed_work(), and then per SNP-guest teardown via mod_delayed_work() (batched by the timeout) once the later patches wire that up. Thanks, Ashish