Re: kernel boot fail with efi earlyprintk (bisected)

[Matt Fleming]

On Tue, 19 Aug, at 04:16:58PM, Dave Young wrote:
> Hi,
> 
> 3.16 kernel boot fail with earlyprintk=efi on my laptop.
> It keeps scrolling at the bottom line of screen.
> 
> Bisected, the first bad commit is below:
> commit 86dfc6f339886559d80ee0d4bd20fe5ee90450f0
> Author: Lv Zheng <lv.zheng@xxxxxxxxx>
> Date:   Fri Apr 4 12:38:57 2014 +0800
> 
>     ACPICA: Tables: Fix table checksums verification before installation.
> 
> 
> I did some debugging by enabling both serial and efi earlyprintk, below is
> some debug dmesg, seems early_ioremap fails in scroll up function due to
> no free slot, but I'm still not sure if the debug info is right or not.

Thanks Dave, your callstack seems to make sense.

Can you also enable early_ioremap_debug so that we can figure out where
all the FIXMAP slots are going?

-- 
Matt Fleming, Intel Open Source Technology Center
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