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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
011d8261 BP |
2 | config RAS_CEC |
3 | bool "Correctable Errors Collector" | |
4 | depends on X86_MCE && MEMORY_FAILURE && DEBUG_FS | |
a7f7f624 | 5 | help |
011d8261 BP |
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. | |
60fd42d2 TL |
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. |