[PATCH] arm64: kconfig: allow support for memory failure handling
punit.agrawal at arm.com
Thu Mar 23 09:12:55 PDT 2017
On 23/03/17 14:33, James Morse wrote:
> Hi Punit,
> On 01/02/17 21:38, Tyler Baicar wrote:
>> From: "Jonathan (Zhixiong) Zhang" <zjzhang at codeaurora.org>
>> If ACPI_APEI and MEMORY_FAILURE is configured, select
>> ACPI_APEI_MEMORY_FAILURE. This enables memory failure recovery
>> when such memory failure is reported through ACPI APEI. APEI
>> (ACPI Platform Error Interfaces) provides a means for the
>> platform to convey error information to the kernel.
>> Declare ARCH_SUPPORTS_MEMORY_FAILURE, as arm64 does support
>> memory failure recovery attempt.
> Am I right in thinking we should wait for the hugepage issue you found with
> hwpoison  to be fixed before arm64 can have ARCH_SUPPORTS_MEMORY_FAILURE?
We should at the least fix the huge_pte_offset() issue discovered in 
before we enable memory failure handling. Earlier today I posted a
RFC fix for it based on Catalin's suggestion.
> (If so, can this patch become part of that series to they are obviously related!)
Good point - I can include the patches enabling memory failure handling
on ARM64 if Tyler's fine with it.
>  https://www.spinics.net/lists/arm-kernel/msg568995.html
>> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
>> index f92778d..4cd12a0 100644
>> --- a/arch/arm64/Kconfig
>> +++ b/arch/arm64/Kconfig
>> @@ -15,6 +15,8 @@ config ARM64
>> select ARCH_HAS_SG_CHAIN
>> select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
>> select ARCH_USE_CMPXCHG_LOCKREF
>> + select ACPI_APEI_MEMORY_FAILURE if ACPI_APEI && MEMORY_FAILURE
>> + select ARCH_SUPPORTS_MEMORY_FAILURE
>> select ARCH_SUPPORTS_ATOMIC_RMW
>> select ARCH_SUPPORTS_NUMA_BALANCING
>> select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
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