Re: [PATCH] x86: mce: Xeon75xx specific interface to get corrected memory error information v2

[Andi Kleen]

Hidetoshi Seto <seto.hidetoshi@xxxxxxxxxxxxxx> writes:

> I have some questions: Is it impossible to get the address
> after polling handler have processed?  e.g. Is it possible to
> implement this module as mcelog's add-on that hooked & invoked
> immediately after reading /dev/mcelog?  I guess there are
> some limitation/restriction to call pfa_command().

You need to be in ring 0. In theory you could do it later, but then
you risk losing the address if there is another error.

> Are there any alternative way to get the address?

No.

> Polling like edac_i7 doesn't help this?

No.

>
> You pointed "This makes it impossible to do predictive failure
> analysis", but I guess we could do rough-but-enough analysis that
> requires coarse resolution like sockets.  Or we should not expect

The main predictive failure analysis interesting here is bad page
offlining and for that you need an address.

-Andi

-- 
ak@xxxxxxxxxxxxxxx -- Speaking for myself only.
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