| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | # SPDX-License-Identifier: GPL-2.0 |
| 2 | config RAS_CEC |
| 3 | bool "Correctable Errors Collector" |
| 4 | depends on X86_MCE && MEMORY_FAILURE && DEBUG_FS |
| 5 | ---help--- |
| 6 | This is a small cache which collects correctable memory errors per 4K |
| 7 | page PFN and counts their repeated occurrence. Once the counter for a |
| 8 | PFN overflows, we try to soft-offline that page as we take it to mean |
| 9 | that it has reached a relatively high error count and would probably |
| 10 | be best if we don't use it anymore. |
| 11 | |
| 12 | Bear in mind that this is absolutely useless if your platform doesn't |
| 13 | have ECC DIMMs and doesn't have DRAM ECC checking enabled in the BIOS. |
| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 14 | |
| 15 | config RAS_CEC_DEBUG |
| 16 | bool "CEC debugging machinery" |
| 17 | default n |
| 18 | depends on RAS_CEC |
| 19 | help |
| 20 | Add extra files to (debugfs)/ras/cec to test the correctable error |
| 21 | collector feature. "pfn" is a writable file that allows user to |
| 22 | simulate an error in a particular page frame. "array" is a read-only |
| 23 | file that dumps out the current state of all pages logged so far. |