HWPOISON: Add simple debugfs interface to inject hwpoison on arbitary PFNs
Useful for some testing scenarios, although specific testing is often
done better through MADV_POISON
This can be done with the x86 level MCE injector too, but this interface
allows it to do independently from low level x86 changes.
v2: Add module license (Haicheng Li)
Signed-off-by: Andi Kleen <ak@linux.intel.com>
diff --git a/mm/Kconfig b/mm/Kconfig
index ea2d8b6..4b4e57a 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -243,6 +243,10 @@
even when some of its memory has uncorrected errors. This requires
special hardware support and typically ECC memory.
+config HWPOISON_INJECT
+ tristate "Poison pages injector"
+ depends on MEMORY_FAILURE && DEBUG_KERNEL
+
config NOMMU_INITIAL_TRIM_EXCESS
int "Turn on mmap() excess space trimming before booting"
depends on !MMU