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