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HWPOISON: Add simple debugfs interface to inject hwpoison on arbitary PFNs

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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 <[email protected]>
This commit is contained in:
Andi Kleen 2009-09-16 11:50:17 +02:00 • committed by Andi Kleen
commit cae681fc12
3 changed files with 46 additions and 0 deletions
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4
mm/Kconfig
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@ -243,6 +243,10 @@ config MEMORY_FAILURE
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