[PATCH v4 5/5] powerpc/mce: hookup memory_failure for UE errors

Michael Ellerman mpe at ellerman.id.au
Mon Oct 16 16:38:05 AEDT 2017

Balbir Singh <bsingharora at gmail.com> writes:

> If we are in user space and hit a UE error, we now have the
> basic infrastructure to walk the page tables and find out
> the effective address that was accessed, since the DAR
> is not valid.
> We use a work_queue content to hookup the bad pfn, any
> other context causes problems, since memory_failure itself
> can call into schedule() via lru_drain_ bits.
> We could probably poison the struct page to avoid a race
> between detection and taking corrective action.
> Signed-off-by: Balbir Singh <bsingharora at gmail.com>
> Reviewed-by: Nicholas Piggin <npiggin at gmail.com>
> ---
>  arch/powerpc/kernel/mce.c | 70 +++++++++++++++++++++++++++++++++++++++++++++--
>  1 file changed, 67 insertions(+), 3 deletions(-)

I'm not sure why this is in mce.c but the rest was in mce_power.c ?


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