Re: [RFC][PATCH v2 0/3] efi_pstore: avoid losing critical message

From: valdis . kletnieks
Date: Sat Jul 21 2012 - 16:52:19 EST

On Thu, 19 Jul 2012 21:11:44 -0000, Seiji Aguchi said:

> [Solution]
> To avoid losing a critical message, this patchset is based on a following concept.
> - A basic policy is _not_ to overwrite existing entries.
> - However, if kernel panics while a system is rebooting, a critical message
> can't be saved by the policy above.
> (In this case, panic message is critical.)

OK, system boots in "overwrite mode", and when done booting, we go into
"non-overwrite mode". Makes sense to me. Only part I'm missing is how/when/why
we leave overwrite mode - what makes the change, and how?

(If I missed an ioctl or /sys entry or something that userspace toggles to say "I'll
take care of it from here", please point me at it and I'll go re-read after I find
some more caffeine ;)

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