Re: [PATCH v4 5/5] powerpc/mce: hookup memory_failure for UE errors
From: Michael Ellerman <mpe@ellerman.id.au>
Date: 2017-10-16 05:38:05
Balbir Singh [off-list ref] 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@gmail.com> Reviewed-by: Nicholas Piggin <npiggin@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 ? cheers