Re: [PATCH] x86/earlyprintk: setup earlyprintk as early as possible

From: Alexander Kuleshov
Date: Tue Apr 07 2015 - 06:19:08 EST

2015-04-07 15:52 GMT+06:00 Ingo Molnar <mingo@xxxxxxxxxx>:
> It would be nice to test it via a well placed printk() and check that
> before the patch the message doesn't go to the serial console and
> after the patch the message indeed arrives on the early serial console
> - or something like that.

I have tested this patch when i wrote it and early_printk does not print
anything before the parse_early_param. But i don't know how to show this
in code in a correct way. Maybe we should to give back early_printk call
which i removed in the previous patch

Any one another question about this. I submited patch only for head64.c
and it does not affect kernel for i386, because i'm not sure where is
the best place to setup earlyprintk in the head32.c. I thought to put
it in the start of i386_start_kernel(void) (from head32.c) but not sure
about it.
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