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-rw-r--r--Documentation/edac.txt112
1 files changed, 8 insertions, 104 deletions
diff --git a/Documentation/edac.txt b/Documentation/edac.txt
index 03df2b0..56c7e93 100644
--- a/Documentation/edac.txt
+++ b/Documentation/edac.txt
@@ -232,116 +232,20 @@ EDAC control and attribute files.
In 'mcX' directories are EDAC control and attribute files for
-this 'X' instance of the memory controllers:
-
-
-Counter reset control file:
-
- 'reset_counters'
-
- This write-only control file will zero all the statistical counters
- for UE and CE errors. Zeroing the counters will also reset the timer
- indicating how long since the last counter zero. This is useful
- for computing errors/time. Since the counters are always reset at
- driver initialization time, no module/kernel parameter is available.
-
- RUN TIME: echo "anything" >/sys/devices/system/edac/mc/mc0/counter_reset
-
- This resets the counters on memory controller 0
-
-
-Seconds since last counter reset control file:
-
- 'seconds_since_reset'
-
- This attribute file displays how many seconds have elapsed since the
- last counter reset. This can be used with the error counters to
- measure error rates.
-
-
-
-Memory Controller name attribute file:
-
- 'mc_name'
-
- This attribute file displays the type of memory controller
- that is being utilized.
-
-
-Total memory managed by this memory controller attribute file:
-
- 'size_mb'
-
- This attribute file displays, in count of megabytes, of memory
- that this instance of memory controller manages.
-
-
-Total Uncorrectable Errors count attribute file:
-
- 'ue_count'
-
- This attribute file displays the total count of uncorrectable
- errors that have occurred on this memory controller. If panic_on_ue
- is set this counter will not have a chance to increment,
- since EDAC will panic the system.
-
-
-Total UE count that had no information attribute fileY:
-
- 'ue_noinfo_count'
-
- This attribute file displays the number of UEs that have occurred
- with no information as to which DIMM slot is having errors.
-
-
-Total Correctable Errors count attribute file:
-
- 'ce_count'
-
- This attribute file displays the total count of correctable
- errors that have occurred on this memory controller. 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.
-
-
-Total Correctable Errors count attribute file:
-
- 'ce_noinfo_count'
-
- This attribute file displays the number of CEs that
- have occurred wherewith no information as to which DIMM slot
- is having errors. Memory is handicapped, but operational,
- yet no information is available to indicate which slot
- the failing memory is in. This count field should be also
- be monitored for non-zero values.
-
-Device Symlink:
-
- 'device'
-
- Symlink to the memory controller device.
-
-Sdram memory scrubbing rate:
-
- 'sdram_scrub_rate'
-
- Read/Write attribute file that controls memory scrubbing. The scrubbing
- rate is set by writing a minimum bandwidth in bytes/sec to the attribute
- file. The rate will be translated to an internal value that gives at
- least the specified rate.
-
- Reading the file will return the actual scrubbing rate employed.
-
- If configuration fails or memory scrubbing is not implemented, accessing
- that attribute will fail.
+this 'X' instance of the memory controllers.
+For a description of the sysfs API, please see:
+ Documentation/ABI/testing/sysfs/devices-edac
============================================================================
'csrowX' DIRECTORIES
+When CONFIG_EDAC_LEGACY_SYSFS is enabled, the sysfs will contain the
+csrowX directories. As this API doesn't work properly for Rambus, FB-DIMMs
+and modern Intel Memory Controllers, this is being deprecated in favor
+of dimmX directories.
+
In the 'csrowX' directories are EDAC control and attribute files for
this 'X' instance of csrow: