diff options
| author | Vishal Verma <vishal.l.verma@intel.com> | 2016-07-23 21:51:21 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2016-07-24 08:04:04 -0700 |
| commit | 6839a6d96f4ea0254266d60208c1fbbd53ade546 (patch) | |
| tree | b1be166d2e7028ce5185e7ad642b5f1598a0cb07 /drivers/acpi/nfit/nfit.h | |
| parent | bdf97013ced5f263da0dc9d559f5c09e922d8423 (diff) | |
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 <rafael.j.wysocki@intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/acpi/nfit/nfit.h')
| -rw-r--r-- | drivers/acpi/nfit/nfit.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/acpi/nfit/nfit.h b/drivers/acpi/nfit/nfit.h index 6ecf337c97aa..ba6074a06958 100644 --- a/drivers/acpi/nfit/nfit.h +++ b/drivers/acpi/nfit/nfit.h @@ -16,6 +16,7 @@ #define __NFIT_H__ #include <linux/workqueue.h> #include <linux/libnvdimm.h> +#include <linux/ndctl.h> #include <linux/types.h> #include <linux/uuid.h> #include <linux/acpi.h> @@ -148,6 +149,7 @@ struct acpi_nfit_desc { struct nd_cmd_ars_status *ars_status; size_t ars_status_size; struct work_struct work; + struct list_head list; struct kernfs_node *scrub_count_state; unsigned int scrub_count; unsigned int cancel:1; @@ -187,6 +189,24 @@ struct nfit_blk { u32 dimm_flags; }; +extern struct list_head acpi_descs; +extern struct mutex acpi_desc_lock; +int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc); + +#ifdef CONFIG_X86_MCE +void nfit_mce_register(void); +void nfit_mce_unregister(void); +#else +static inline void nfit_mce_register(void) +{ +} +static inline void nfit_mce_unregister(void) +{ +} +#endif + +int nfit_spa_type(struct acpi_nfit_system_address *spa); + static inline struct acpi_nfit_memory_map *__to_nfit_memdev( struct nfit_mem *nfit_mem) { |