Re: [PATCH v6] x86: mce: kexec: switch MCE handler for kexec/kdump

From: Borislav Petkov
Date: Fri Mar 06 2015 - 04:29:01 EST

On Fri, Mar 06, 2015 at 09:09:30AM +0000, Naoya Horiguchi wrote:
> I'm not sure why that works, could you elabroate it?

Because the _safe() variants are only for handling reads to possibly
non-existent MSRs. The _STATUS MSRs which you're accessing are
guaranteed to be present, otherwise __mcheck_cpu_cap_init() would've
disabled MCA on the first kernel, thus the mca_cfg.disabled check.

We can always switch to the _safe() variants later if really needed - I
just don't see the need for them right now.


ECO tip #101: Trim your mails when you reply.
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