Re: compiling kernel 2.6.13

To:	Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Subject:	Re: compiling kernel 2.6.13
From:	Thiemo Seufer <ths@networkno.de>
Date:	Thu, 1 Sep 2005 10:33:34 +0200
Cc:	ralf@linux-mips.org, geoman@gentoo.org, linux-mips@linux-mips.org
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References:	<4315CD1C.80203@gentoo.org> <20050831153509.GF3377@linux-mips.org> <20050831155526.GW21717@hattusa.textio> <20050901.012247.36920050.anemo@mba.ocn.ne.jp>
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Atsushi Nemoto wrote:
> >>>>> On Wed, 31 Aug 2005 17:55:26 +0200, Thiemo Seufer <ths@networkno.de> 
> >>>>> said:
> >> But that seems an IP22-specific problem.
> 
> ths> I _think_ it hits every 64bit kernel which uses mappings in
> ths> CKSEG0.  Do you know a system where this works?
> 
> Though I do not have IP22, I think this line in mach-ip22/space.h is
> inappropriate.
> 
> #define MAP_BASE              0xffffffffc0000000
> 
> It will make VMALLOC_END in pgtabe-64.h overflow.
> 
> #define VMALLOC_START         MAP_BASE
> #define VMALLOC_END   \
>       (VMALLOC_START + PTRS_PER_PGD * PTRS_PER_PMD * PTRS_PER_PTE * PAGE_SIZE)
> 
> Shoule we use 0xc000000000000000 as MAP_BASE for IP22 ?

Thanks, this helped!


Thiemo

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