0001 # SPDX-License-Identifier: GPL-2.0
0002 config RAS_CEC
0003 bool "Correctable Errors Collector"
0004 depends on X86_MCE && MEMORY_FAILURE && DEBUG_FS
0005 help
0006 This is a small cache which collects correctable memory errors per 4K
0007 page PFN and counts their repeated occurrence. Once the counter for a
0008 PFN overflows, we try to soft-offline that page as we take it to mean
0009 that it has reached a relatively high error count and would probably
0010 be best if we don't use it anymore.
0011
0012 Bear in mind that this is absolutely useless if your platform doesn't
0013 have ECC DIMMs and doesn't have DRAM ECC checking enabled in the BIOS.
0014
0015 config RAS_CEC_DEBUG
0016 bool "CEC debugging machinery"
0017 default n
0018 depends on RAS_CEC
0019 help
0020 Add extra files to (debugfs)/ras/cec to test the correctable error
0021 collector feature. "pfn" is a writable file that allows user to
0022 simulate an error in a particular page frame. "array" is a read-only
0023 file that dumps out the current state of all pages logged so far.
