Re: kernel boot fail with efi earlyprintk (bisected)

[Matt Fleming]

On Mon, 25 Aug, at 05:06:19PM, Dave Young wrote:
> 
> Problem is I do not understand the implementation detail yet.
> 
> I did below changes:
> 
> Original values:
> #define NR_FIX_BTMAPS           64
> #define FIX_BTMAPS_SLOTS        4
> 
> -> new values tested:
> #define NR_FIX_BTMAPS           32
> #define FIX_BTMAPS_SLOTS        8
> 
> 
> There's below comments
>         /*
>          * 256 temporary boot-time mappings, used by early_ioremap(),
>          * before ioremap() is functional.
>          *
>          * If necessary we round it up to the next 256 pages boundary so
>          * that we can have a single pgd entry and a single pte table:
>          */
> 
> So seems increase it to 64 * 8 = 512 should be ok. If it's fine I can test again
> and post a patch.

Make sure you include the x86 maintainers on Cc if you change these
values.

-- 
Matt Fleming, Intel Open Source Technology Center
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