Documentation/ABI/testing/sysfs-devices-edac

   1 What:           /sys/devices/system/edac/mc/mc*/reset_counters
   2 Date:           January 2006
   3 Contact:        linux-edac@vger.kernel.org
   4 Description:    This write-only control file will zero all the statistical
   5                 counters for UE and CE errors on the given memory controller.
   6                 Zeroing the counters will also reset the timer indicating how
   7                 long since the last counter were reset. This is useful for
   8                 computing errors/time.  Since the counters are always reset
   9                 at driver initialization time, no module/kernel parameter
  10                 is available.
  11
  12 What:           /sys/devices/system/edac/mc/mc*/seconds_since_reset
  13 Date:           January 2006
  14 Contact:        linux-edac@vger.kernel.org
  15 Description:    This attribute file displays how many seconds have elapsed
  16                 since the last counter reset. This can be used with the error
  17                 counters to measure error rates.
  18
  19 What:           /sys/devices/system/edac/mc/mc*/mc_name
  20 Date:           January 2006
  21 Contact:        linux-edac@vger.kernel.org
  22 Description:    This attribute file displays the type of memory controller
  23                 that is being utilized.
  24
  25 What:           /sys/devices/system/edac/mc/mc*/size_mb
  26 Date:           January 2006
  27 Contact:        linux-edac@vger.kernel.org
  28 Description:    This attribute file displays, in count of megabytes, of memory
  29                 that this memory controller manages.
  30
  31 What:           /sys/devices/system/edac/mc/mc*/ue_count
  32 Date:           January 2006
  33 Contact:        linux-edac@vger.kernel.org
  34 Description:    This attribute file displays the total count of uncorrectable
  35                 errors that have occurred on this memory controller. If
  36                 panic_on_ue is set, this counter will not have a chance to
  37                 increment, since EDAC will panic the system
  38
  39 What:           /sys/devices/system/edac/mc/mc*/ue_noinfo_count
  40 Date:           January 2006
  41 Contact:        linux-edac@vger.kernel.org
  42 Description:    This attribute file displays the number of UEs that have
  43                 occurred on this memory controller with no information as to
  44                 which DIMM slot is having errors.
  45
  46 What:           /sys/devices/system/edac/mc/mc*/ce_count
  47 Date:           January 2006
  48 Contact:        linux-edac@vger.kernel.org
  49 Description:    This attribute file displays the total count of correctable
  50                 errors that have occurred on this memory controller. This
  51                 count is very important to examine. CEs provide early
  52                 indications that a DIMM is beginning to fail. This count
  53                 field should be monitored for non-zero values and report
  54                 such information to the system administrator.
  55
  56 What:           /sys/devices/system/edac/mc/mc*/ce_noinfo_count
  57 Date:           January 2006
  58 Contact:        linux-edac@vger.kernel.org
  59 Description:    This attribute file displays the number of CEs that
  60                 have occurred on this memory controller wherewith no
  61                 information as to which DIMM slot is having errors. Memory is
  62                 handicapped, but operational, yet no information is available
  63                 to indicate which slot the failing memory is in. This count
  64                 field should be also be monitored for non-zero values.
  65
  66 What:           /sys/devices/system/edac/mc/mc*/sdram_scrub_rate
  67 Date:           February 2007
  68 Contact:        linux-edac@vger.kernel.org
  69 Description:    Read/Write attribute file that controls memory scrubbing.
  70                 The scrubbing rate used by the memory controller is set by
  71                 writing a minimum bandwidth in bytes/sec to the attribute file.
  72                 The rate will be translated to an internal value that gives at
  73                 least the specified rate.
  74                 Reading the file will return the actual scrubbing rate employed.
  75                 If configuration fails or memory scrubbing is not implemented,
  76                 the value of the attribute file will be -1.