From 6839a6d96f4ea0254266d60208c1fbbd53ade546 Mon Sep 17 00:00:00 2001 From: Vishal Verma Date: Sat, 23 Jul 2016 21:51:21 -0700 Subject: nfit: do an ARS scrub on hitting a latent media error When a latent (unknown to 'badblocks') error is encountered, it will trigger a machine check exception. On a system with machine check recovery, this will only SIGBUS the process(es) which had the bad page mapped (as opposed to a kernel panic on platforms without machine check recovery features). In the former case, we want to trigger a full rescan of that nvdimm bus. This will allow any additional, new errors to be captured in the block devices' badblocks lists, and offending operations on them can be trapped early, avoiding machine checks. This is done by registering a callback function with the x86_mce_decoder_chain and calling the new ars_rescan functionality with the address in the mce notificatiion. Cc: Rafael J. Wysocki Cc: Tony Luck Signed-off-by: Vishal Verma Signed-off-by: Dan Williams --- tools/testing/nvdimm/Kbuild | 1 + 1 file changed, 1 insertion(+) (limited to 'tools') diff --git a/tools/testing/nvdimm/Kbuild b/tools/testing/nvdimm/Kbuild index 0dca8ff7557b..ad6dd0543019 100644 --- a/tools/testing/nvdimm/Kbuild +++ b/tools/testing/nvdimm/Kbuild @@ -30,6 +30,7 @@ obj-$(CONFIG_DEV_DAX) += dax.o obj-$(CONFIG_DEV_DAX_PMEM) += dax_pmem.o nfit-y := $(ACPI_SRC)/core.o +nfit-$(CONFIG_X86_MCE) += $(ACPI_SRC)/mce.o nfit-y += config_check.o nd_pmem-y := $(NVDIMM_SRC)/pmem.o -- cgit v1.2.3-59-g8ed1b