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[PATCH] EDAC: documentation spelling fixes
Fix spelling errors in EDAC documentation. Signed-off-by: David S. Peterson <dsp@llnl.gov> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -21,7 +21,7 @@ within the computer system. In the initial release, memory Correctable Errors
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Detecting CE events, then harvesting those events and reporting them,
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Detecting CE events, then harvesting those events and reporting them,
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CAN be a predictor of future UE events. With CE events, the system can
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CAN be a predictor of future UE events. With CE events, the system can
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continue to operate, but with less safety. Preventive maintainence and
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continue to operate, but with less safety. Preventive maintenance and
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proactive part replacement of memory DIMMs exhibiting CEs can reduce
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proactive part replacement of memory DIMMs exhibiting CEs can reduce
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the likelihood of the dreaded UE events and system 'panics'.
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the likelihood of the dreaded UE events and system 'panics'.
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@ -29,13 +29,13 @@ the likelihood of the dreaded UE events and system 'panics'.
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In addition, PCI Bus Parity and SERR Errors are scanned for on PCI devices
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In addition, PCI Bus Parity and SERR Errors are scanned for on PCI devices
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in order to determine if errors are occurring on data transfers.
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in order to determine if errors are occurring on data transfers.
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The presence of PCI Parity errors must be examined with a grain of salt.
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The presence of PCI Parity errors must be examined with a grain of salt.
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There are several addin adapters that do NOT follow the PCI specification
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There are several add-in adapters that do NOT follow the PCI specification
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with regards to Parity generation and reporting. The specification says
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with regards to Parity generation and reporting. The specification says
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the vendor should tie the parity status bits to 0 if they do not intend
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the vendor should tie the parity status bits to 0 if they do not intend
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to generate parity. Some vendors do not do this, and thus the parity bit
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to generate parity. Some vendors do not do this, and thus the parity bit
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can "float" giving false positives.
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can "float" giving false positives.
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The PCI Parity EDAC device has the ability to "skip" known flakey
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The PCI Parity EDAC device has the ability to "skip" known flaky
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cards during the parity scan. These are set by the parity "blacklist"
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cards during the parity scan. These are set by the parity "blacklist"
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interface in the sysfs for PCI Parity. (See the PCI section in the sysfs
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interface in the sysfs for PCI Parity. (See the PCI section in the sysfs
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section below.) There is also a parity "whitelist" which is used as
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section below.) There is also a parity "whitelist" which is used as
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@ -101,7 +101,7 @@ Memory Controller (mc) Model
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First a background on the memory controller's model abstracted in EDAC.
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First a background on the memory controller's model abstracted in EDAC.
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Each mc device controls a set of DIMM memory modules. These modules are
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Each mc device controls a set of DIMM memory modules. These modules are
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layed out in a Chip-Select Row (csrowX) and Channel table (chX). There can
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laid out in a Chip-Select Row (csrowX) and Channel table (chX). There can
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be multiple csrows and two channels.
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be multiple csrows and two channels.
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Memory controllers allow for several csrows, with 8 csrows being a typical value.
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Memory controllers allow for several csrows, with 8 csrows being a typical value.
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@ -131,7 +131,7 @@ for memory DIMMs:
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DIMM_B1
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DIMM_B1
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Labels for these slots are usually silk screened on the motherboard. Slots
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Labels for these slots are usually silk screened on the motherboard. Slots
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labeled 'A' are channel 0 in this example. Slots labled 'B'
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labeled 'A' are channel 0 in this example. Slots labeled 'B'
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are channel 1. Notice that there are two csrows possible on a
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are channel 1. Notice that there are two csrows possible on a
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physical DIMM. These csrows are allocated their csrow assignment
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physical DIMM. These csrows are allocated their csrow assignment
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based on the slot into which the memory DIMM is placed. Thus, when 1 DIMM
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based on the slot into which the memory DIMM is placed. Thus, when 1 DIMM
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@ -140,7 +140,7 @@ is placed in each Channel, the csrows cross both DIMMs.
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Memory DIMMs come single or dual "ranked". A rank is a populated csrow.
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Memory DIMMs come single or dual "ranked". A rank is a populated csrow.
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Thus, 2 single ranked DIMMs, placed in slots DIMM_A0 and DIMM_B0 above
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Thus, 2 single ranked DIMMs, placed in slots DIMM_A0 and DIMM_B0 above
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will have 1 csrow, csrow0. csrow1 will be empty. On the other hand,
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will have 1 csrow, csrow0. csrow1 will be empty. On the other hand,
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when 2 dual ranked DIMMs are similiaryly placed, then both csrow0 and
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when 2 dual ranked DIMMs are similarly placed, then both csrow0 and
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csrow1 will be populated. The pattern repeats itself for csrow2 and
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csrow1 will be populated. The pattern repeats itself for csrow2 and
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csrow3.
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csrow3.
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@ -246,7 +246,7 @@ Module Version read-only attribute file:
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'mc_version'
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'mc_version'
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The EDAC CORE modules's version and compile date are shown here to
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The EDAC CORE module's version and compile date are shown here to
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indicate what EDAC is running.
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indicate what EDAC is running.
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@ -423,7 +423,7 @@ Total memory managed by this csrow attribute file:
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'size_mb'
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'size_mb'
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This attribute file displays, in count of megabytes, of memory
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This attribute file displays, in count of megabytes, of memory
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that this csrow contatins.
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that this csrow contains.
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Memory Type attribute file:
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Memory Type attribute file:
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@ -557,7 +557,7 @@ On Header Type 00 devices the primary status is looked at
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for any parity error regardless of whether Parity is enabled on the
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for any parity error regardless of whether Parity is enabled on the
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device. (The spec indicates parity is generated in some cases).
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device. (The spec indicates parity is generated in some cases).
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On Header Type 01 bridges, the secondary status register is also
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On Header Type 01 bridges, the secondary status register is also
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looked at to see if parity ocurred on the bus on the other side of
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looked at to see if parity occurred on the bus on the other side of
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the bridge.
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the bridge.
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@ -588,7 +588,7 @@ Panic on PCI PARITY Error:
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'panic_on_pci_parity'
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'panic_on_pci_parity'
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This control files enables or disables panic'ing when a parity
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This control files enables or disables panicking when a parity
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error has been detected.
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error has been detected.
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@ -616,12 +616,12 @@ PCI Device Whitelist:
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This control file allows for an explicit list of PCI devices to be
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This control file allows for an explicit list of PCI devices to be
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scanned for parity errors. Only devices found on this list will
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scanned for parity errors. Only devices found on this list will
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be examined. The list is a line of hexadecimel VENDOR and DEVICE
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be examined. The list is a line of hexadecimal VENDOR and DEVICE
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ID tuples:
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ID tuples:
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1022:7450,1434:16a6
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1022:7450,1434:16a6
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One or more can be inserted, seperated by a comma.
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One or more can be inserted, separated by a comma.
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To write the above list doing the following as one command line:
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To write the above list doing the following as one command line:
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@ -639,11 +639,11 @@ PCI Device Blacklist:
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This control file allows for a list of PCI devices to be
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This control file allows for a list of PCI devices to be
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skipped for scanning.
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skipped for scanning.
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The list is a line of hexadecimel VENDOR and DEVICE ID tuples:
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The list is a line of hexadecimal VENDOR and DEVICE ID tuples:
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1022:7450,1434:16a6
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1022:7450,1434:16a6
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One or more can be inserted, seperated by a comma.
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One or more can be inserted, separated by a comma.
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To write the above list doing the following as one command line:
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To write the above list doing the following as one command line:
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@ -651,14 +651,14 @@ PCI Device Blacklist:
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> /sys/devices/system/edac/pci/pci_parity_blacklist
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> /sys/devices/system/edac/pci/pci_parity_blacklist
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To display what the whitelist current contatins,
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To display what the whitelist currently contains,
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simply 'cat' the same file.
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simply 'cat' the same file.
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=======================================================================
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=======================================================================
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PCI Vendor and Devices IDs can be obtained with the lspci command. Using
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PCI Vendor and Devices IDs can be obtained with the lspci command. Using
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the -n option lspci will display the vendor and device IDs. The system
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the -n option lspci will display the vendor and device IDs. The system
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adminstrator will have to determine which devices should be scanned or
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administrator will have to determine which devices should be scanned or
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skipped.
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skipped.
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@ -669,5 +669,5 @@ Turn OFF a whitelist by an empty echo command:
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echo > /sys/devices/system/edac/pci/pci_parity_whitelist
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echo > /sys/devices/system/edac/pci/pci_parity_whitelist
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and any previous blacklist will be utililzed.
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and any previous blacklist will be utilized.
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