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SubjectRe: warning in arch/x86/kernel/cpu/mtrr/generic.c:400 with 2.6.29-rc3 on IBM x3400
Morten P.D. Stevens wrote:
> Hi,
>
>> so there is some problem with your BIOS, please ask the vendor to
>> provide one to make
>> 2.6.24 happy.
>
> I'll report the issue to the IBM support.
>
> on our IBM x3400 servers running RHEL the same output:
>
> 2.6.18-92.1.10.el5 #
>
> reg00: base=0xc0000000 (3072MB), size=1024MB: uncachable, count=1
> reg01: base=0x00000000 ( 0MB), size=4096MB: write-back, count=1
> reg02: base=0x100000000 (4096MB), size=1024MB: write-back, count=1
> reg03: base=0xbff80000 (3071MB), size=196608MB: uncachable, count=1

so that bios need to be fixed too.

>
> and in dmesg:
>
> mtrr: type mismatch for d0000000,1000000 old: uncachable new:
> write-combining
want add one entry for xwindow with your display card.
>
>
> Is this a big problem for direct usage? The performance on these servers
> is still fine...?
x window could be some slow.

YH


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