| # 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. |