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Message-Id: <1334672580-12883-2-git-send-email-mchehab@redhat.com> Date: Tue, 17 Apr 2012 11:22:59 -0300 From: Mauro Carvalho Chehab <mchehab@...hat.com> To: Greg K H <gregkh@...uxfoundation.org> Cc: Mauro Carvalho Chehab <mchehab@...hat.com>, Linux Edac Mailing List <linux-edac@...r.kernel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: [PATCH 1/2] edac: move documentation ABI to ABI/testing/sysfs-devices-edac The EDAC MC API is currently stored at the wrong place. Move the parts of the EDAC MC ABI that will be kept to ABI/testing/sysfs-devices-edac. The Date: field were added based on git timestamps for the git commit patches that added the functionality at edac.txt. Signed-off-by: Mauro Carvalho Chehab <mchehab@...hat.com> --- Documentation/ABI/testing/sysfs-devices-edac | 76 +++++++++++++++++ Documentation/edac.txt | 112 ++------------------------ 2 files changed, 84 insertions(+), 104 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-devices-edac diff --git a/Documentation/ABI/testing/sysfs-devices-edac b/Documentation/ABI/testing/sysfs-devices-edac new file mode 100644 index 0000000..40db633 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-devices-edac @@ -0,0 +1,76 @@ +What: /sys/devices/system/edac/mc/mc*/reset_counters +Date: January 2006 +Contact: linux-edac@...r.kernel.org +Description: This write-only control file will zero all the statistical + counters for UE and CE errors on the given memory controller. + Zeroing the counters will also reset the timer indicating how + long since the last counter were reset. This is useful for + computing errors/time. Since the counters are always reset + at driver initialization time, no module/kernel parameter + is available. + +What: /sys/devices/system/edac/mc/mc*/seconds_since_reset +Date: January 2006 +Contact: linux-edac@...r.kernel.org +Description: 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. + +What: /sys/devices/system/edac/mc/mc*/mc_name +Date: January 2006 +Contact: linux-edac@...r.kernel.org +Description: This attribute file displays the type of memory controller + that is being utilized. + +What: /sys/devices/system/edac/mc/mc*/size_mb +Date: January 2006 +Contact: linux-edac@...r.kernel.org +Description: This attribute file displays, in count of megabytes, of memory + that this memory controller manages. + +What: /sys/devices/system/edac/mc/mc*/ue_count +Date: January 2006 +Contact: linux-edac@...r.kernel.org +Description: 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 + +What: /sys/devices/system/edac/mc/mc*/ue_noinfo_count +Date: January 2006 +Contact: linux-edac@...r.kernel.org +Description: This attribute file displays the number of UEs that have + occurred on this memory controller with no information as to + which DIMM slot is having errors. + +What: /sys/devices/system/edac/mc/mc*/ce_count +Date: January 2006 +Contact: linux-edac@...r.kernel.org +Description: 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. + +What: /sys/devices/system/edac/mc/mc*/ce_noinfo_count +Date: January 2006 +Contact: linux-edac@...r.kernel.org +Description: This attribute file displays the number of CEs that + have occurred on this memory controller 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. + +What: /sys/devices/system/edac/mc/mc*/sdram_scrub_rate +Date: February 2007 +Contact: linux-edac@...r.kernel.org +Description: Read/Write attribute file that controls memory scrubbing. + The scrubbing rate used by the memory controller 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, + the value of the attribute file will be -1. diff --git a/Documentation/edac.txt b/Documentation/edac.txt index 249822c..c25f086 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, the value - of the attribute file will be -1. +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: -- 1.7.8 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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