Given the fact that ARS can take 10s to 100s of seconds it is not feasible to wait for ARS completion before publishing persistent memory namespaces. Instead convert the ARS implementation to perform a short ARS for critical errors, ones that caused a previous system reset, before registering namespaces. Finally, arrange for all long ARS operations to run in the background and populate the badblock lists at run time.
While developing this rework a handful of cleanups and fixes also fell out.
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Dan Williams (6): nfit: fix region registration vs block-data-window ranges nfit, address-range-scrub: fix scrub in-progress reporting libnvdimm: add an api to cast a 'struct nd_region' to its 'struct device' nfit, address-range-scrub: introduce nfit_spa->ars_state nfit, address-range-scrub: rework and simplify ARS state machine nfit, address-range-scrub: add module option to skip initial ars
drivers/acpi/nfit/core.c | 443 ++++++++++++++++++------------------------ drivers/acpi/nfit/nfit.h | 13 + drivers/nvdimm/nd.h | 1 drivers/nvdimm/region_devs.c | 8 + include/linux/libnvdimm.h | 1 5 files changed, 213 insertions(+), 253 deletions(-)