Re: [PATCH v9 3/7] acpi: apei: Add SEI notification type support for ARMv8

From: gengdongjiu
Date: Tue Jan 23 2018 - 05:10:01 EST


sorry fix a typo.

On 2018/1/23 17:23, gengdongjiu wrote:
>> There are problems with doing this:
>>
>> Oct. 18, 2017, 10:26 a.m. James Morse wrote:
>> | How do SEA and SEI interact?
>> |
>> | As far as I can see they can both interrupt each other, which isn't something
>> | the single in_nmi() path in APEI can handle. I thinks we should fix this
>> | first.
>>
>> [..]
>>
>> | SEA gets away with a lot of things because its synchronous. SEI isn't. Xie
>> | XiuQi pointed to the memory_failure_queue() code. We can use this directly
>> | from SEA, but not SEI. (what happens if an SError arrives while we are
>> | queueing memory_failure work from an IRQ).
>> |
>> | The one that scares me is the trace-point reporting stuff. What happens if an
>> | SError arrives while we are enabling a trace point? (these are static-keys
>> | right?)
>> |
>> | I don't think we can just plumb SEI in like this and be done with it.
>> | (I'm looking at teasing out the estatus cache code from being x86:NMI only.
>> | This way we solve the same 'cant do this from NMI context' with the same
>> | code'.)
>>
>>
>> I will post what I've got for this estatus-cache thing as an RFC, its not ready
>> to be considered yet.

Yes, I know you are dong that. Your serial's patch will consider all above things, right?
If your patch can be consider that, this patch can based on your patchset. thanks.

>
>>