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EDAC: Expose per-DIMM error counts in sysfs

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The old csrowX sysfs directories have per-csrow error counters, but the
new dimmX directories do not currently expose error counts.

EDAC already keeps these counts, add them to sysfs so per-DIMM counts
are still available when CONFIG_EDAC_LEGACY_SYSFS=n.

Signed-off-by: Aaron Miller <aaronmiller@fb.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/20161103220153.3997328-1-aaronmiller@fb.com
Signed-off-by: Borislav Petkov <bp@suse.de>
This commit is contained in:
Aaron Miller
2016-11-03 15:01:53 -07:00
committed by Borislav Petkov
parent 2287c63643
commit 4fb6fde74d
3 changed files with 75 additions and 0 deletions
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20
Documentation/admin-guide/ras.rst
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@@ -438,11 +438,13 @@ A typical EDAC system has the following structure under
│   │   ├── ce_count
│   │   ├── ce_noinfo_count
│   │   ├── dimm0
│   │   │   ├── dimm_ce_count
│   │   │   ├── dimm_dev_type
│   │   │   ├── dimm_edac_mode
│   │   │   ├── dimm_label
│   │   │   ├── dimm_location
│   │   │   ├── dimm_mem_type
│   │   │   ├── dimm_ue_count
│   │   │   ├── size
│   │   │   └── uevent
│   │   ├── max_location
@@ -457,11 +459,13 @@ A typical EDAC system has the following structure under
│   │   ├── ce_count
│   │   ├── ce_noinfo_count
│   │   ├── dimm0
│   │   │   ├── dimm_ce_count
│   │   │   ├── dimm_dev_type
│   │   │   ├── dimm_edac_mode
│   │   │   ├── dimm_label
│   │   │   ├── dimm_location
│   │   │   ├── dimm_mem_type
│   │   │   ├── dimm_ue_count
│   │   │   ├── size
│   │   │   └── uevent
│   │   ├── max_location
@@ -483,6 +487,22 @@ this ``X`` memory module:
This attribute file displays, in count of megabytes, the memory
that this csrow contains.
- ``dimm_ue_count`` - Uncorrectable Errors count attribute file
This attribute file displays the total count of uncorrectable
errors that have occurred on this DIMM. If panic_on_ue is set
this counter will not have a chance to increment, since EDAC
will panic the system.
- ``dimm_ce_count`` - Correctable Errors count attribute file
This attribute file displays the total count of correctable
errors that have occurred on this DIMM. This count is very
important to examine. CEs provide early indications that a
DIMM is beginning to fail. This count field should be
monitored for non-zero values and report such information
to the system administrator.
- ``dimm_dev_type`` - Device type attribute file
This attribute file will display what type of DRAM device is