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1What: /sys/devices/system/edac/mc/mc*/reset_counters2Date: January 20063Contact: linux-edac@vger.kernel.org4Description: This write-only control file will zero all the statistical5 counters for UE and CE errors on the given memory controller.6 Zeroing the counters will also reset the timer indicating how7 long since the last counter were reset. This is useful for8 computing errors/time. Since the counters are always reset9 at driver initialization time, no module/kernel parameter10 is available.11 12What: /sys/devices/system/edac/mc/mc*/seconds_since_reset13Date: January 200614Contact: linux-edac@vger.kernel.org15Description: This attribute file displays how many seconds have elapsed16 since the last counter reset. This can be used with the error17 counters to measure error rates.18 19What: /sys/devices/system/edac/mc/mc*/mc_name20Date: January 200621Contact: linux-edac@vger.kernel.org22Description: This attribute file displays the type of memory controller23 that is being utilized.24 25What: /sys/devices/system/edac/mc/mc*/size_mb26Date: January 200627Contact: linux-edac@vger.kernel.org28Description: This attribute file displays, in count of megabytes, of memory29 that this memory controller manages.30 31What: /sys/devices/system/edac/mc/mc*/ue_count32Date: January 200633Contact: linux-edac@vger.kernel.org34Description: This attribute file displays the total count of uncorrectable35 errors that have occurred on this memory controller. If36 panic_on_ue is set, this counter will not have a chance to37 increment, since EDAC will panic the system38 39What: /sys/devices/system/edac/mc/mc*/ue_noinfo_count40Date: January 200641Contact: linux-edac@vger.kernel.org42Description: This attribute file displays the number of UEs that have43 occurred on this memory controller with no information as to44 which DIMM slot is having errors.45 46What: /sys/devices/system/edac/mc/mc*/ce_count47Date: January 200648Contact: linux-edac@vger.kernel.org49Description: This attribute file displays the total count of correctable50 errors that have occurred on this memory controller. This51 count is very important to examine. CEs provide early52 indications that a DIMM is beginning to fail. This count53 field should be monitored for non-zero values and report54 such information to the system administrator.55 56What: /sys/devices/system/edac/mc/mc*/ce_noinfo_count57Date: January 200658Contact: linux-edac@vger.kernel.org59Description: This attribute file displays the number of CEs that60 have occurred on this memory controller wherewith no61 information as to which DIMM slot is having errors. Memory is62 handicapped, but operational, yet no information is available63 to indicate which slot the failing memory is in. This count64 field should be also be monitored for non-zero values.65 66What: /sys/devices/system/edac/mc/mc*/sdram_scrub_rate67Date: February 200768Contact: linux-edac@vger.kernel.org69Description: Read/Write attribute file that controls memory scrubbing.70 The scrubbing rate used by the memory controller is set by71 writing a minimum bandwidth in bytes/sec to the attribute file.72 The rate will be translated to an internal value that gives at73 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 -1.77 78What: /sys/devices/system/edac/mc/mc*/max_location79Date: April 201280Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>81 linux-edac@vger.kernel.org82Description: This attribute file displays the information about the last83 available memory slot in this memory controller. It is used by84 userspace tools in order to display the memory filling layout.85 86What: /sys/devices/system/edac/mc/mc*/(dimm|rank)*/size87Date: April 201288Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>89 linux-edac@vger.kernel.org90Description: This attribute file will display the size of dimm or rank.91 For dimm*/size, this is the size, in MB of the DIMM memory92 stick. For rank*/size, this is the size, in MB for one rank93 of the DIMM memory stick. On single rank memories (1R), this94 is also the total size of the dimm. On dual rank (2R) memories,95 this is half the size of the total DIMM memories.96 97What: /sys/devices/system/edac/mc/mc*/(dimm|rank)*/dimm_dev_type98Date: April 201299Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>100 linux-edac@vger.kernel.org101Description: This attribute file will display what type of DRAM device is102 being utilized on this DIMM (x1, x2, x4, x8, ...).103 104What: /sys/devices/system/edac/mc/mc*/(dimm|rank)*/dimm_edac_mode105Date: April 2012106Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>107 linux-edac@vger.kernel.org108Description: This attribute file will display what type of Error detection109 and correction is being utilized. For example: S4ECD4ED would110 mean a Chipkill with x4 DRAM.111 112What: /sys/devices/system/edac/mc/mc*/(dimm|rank)*/dimm_label113Date: April 2012114Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>115 linux-edac@vger.kernel.org116Description: This control file allows this DIMM to have a label assigned117 to it. With this label in the module, when errors occur118 the output can provide the DIMM label in the system log.119 This becomes vital for panic events to isolate the120 cause of the UE event.121 DIMM Labels must be assigned after booting, with information122 that correctly identifies the physical slot with its123 silk screen label. This information is currently very124 motherboard specific and determination of this information125 must occur in userland at this time.126 127What: /sys/devices/system/edac/mc/mc*/(dimm|rank)*/dimm_location128Date: April 2012129Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>130 linux-edac@vger.kernel.org131Description: This attribute file will display the location (csrow/channel,132 branch/channel/slot or channel/slot) of the dimm or rank.133 134What: /sys/devices/system/edac/mc/mc*/(dimm|rank)*/dimm_mem_type135Date: April 2012136Contact: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>137 linux-edac@vger.kernel.org138Description: This attribute file will display what type of memory is139 currently on this csrow. Normally, either buffered or140 unbuffered memory (for example, Unbuffered-DDR3).141 142What: /sys/devices/system/edac/mc/mc*/(dimm|rank)*/dimm_ce_count143Date: October 2016144Contact: linux-edac@vger.kernel.org145Description: This attribute file displays the total count of correctable146 errors that have occurred on this DIMM. This count is very important147 to examine. CEs provide early indications that a DIMM is beginning148 to fail. This count field should be monitored for non-zero values149 and report such information to the system administrator.150 151What: /sys/devices/system/edac/mc/mc*/(dimm|rank)*/dimm_ue_count152Date: October 2016153Contact: linux-edac@vger.kernel.org154Description: This attribute file displays the total count of uncorrectable155 errors that have occurred on this DIMM. If panic_on_ue is set, this156 counter will not have a chance to increment, since EDAC will panic the157 system158