On Mon, 10 Apr 2000, Lyle Coder wrote:
> Actually, I forgot to ask in my last email... I could not understand
> why BUG() was there.., On my system I was running into that code, and
> couldnt understand why it was happening, so yes, we should put it back
> when we figure out why we are hitting that code. Any advance pointers
> will help me debug.
i think this is a side-effect of running kmap() prior free_area_init().
The BUGs are correct, that code path must never be taken.
> Also you are right that it will crash if someone specifies mem=512M
> when the BIOS actually put the tables in say 2GB range. How do we
> solve this?
i believe my original idea of using kmap() was conceptually broken. kmap()
inherently relies on having a valid mem_map[] entry for that page. We will
likely need a boot_ioremap() which works during early bootup, like Manfred
suggested.
Ingo
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This archive was generated by hypermail 2b29 : Sat Apr 15 2000 - 21:00:18 EST