[gentoo-user] [OT] Disable memory

[gentoo-user] [OT] Disable memory

[Peper]

Hello,
Is there anyway to disable specific part of memory? memtest86 freezes only 
when egzamining first MB of it.

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Peper
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Re: [gentoo-user] [OT] Disable memory

[Dale]

Peper wrote:

>Hello,
>Is there anyway to disable specific part of memory? memtest86 freezes only 
>when egzamining first MB of it.
>
>  
>
LOL.  Could it be bad you think??  If you have two sticks of ram, swap
them around and see if it fails somewhere else then.  If it does, bad
ram, if not, memtest has a bug.

I'm not sure how to make it not test it all though.  I have also never
had it lock up. I have tested some really old rigs as well as some new ones.

Dale
:-)

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[gentoo-user] Re: [OT] Disable memory

[Peper]

> LOL.  Could it be bad you think??  If you have two sticks of ram, swap
> them around and see if it fails somewhere else then.  If it does, bad
> ram, if not, memtest has a bug.
> I'm not sure how to make it not test it all though.  I have also never
> had it lock up. I have tested some really old rigs as well as some new
> ones.

I think you have misunedstood me. My memory is bad for sure, beacause my PC 
freezes between-whiles. Memtest does the same during test 5(block move) when 
egamining 1st MB of it(you can set which part of memory you want to check). 
And my questions is, how can i disable this first MB from being used by 
system? I was thinking of setting ramfs in this 1st MB and then not using it, 
but is it possible?

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Peper
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Re: [gentoo-user] Re: [OT] Disable memory

[Hemmann, Volker Armin]

On Sunday 13 November 2005 23:57, Peper wrote:
> > LOL.  Could it be bad you think??  If you have two sticks of ram, swap
> > them around and see if it fails somewhere else then.  If it does, bad
> > ram, if not, memtest has a bug.
> > I'm not sure how to make it not test it all though.  I have also never
> > had it lock up. I have tested some really old rigs as well as some new
> > ones.
>
> I think you have misunedstood me. My memory is bad for sure, beacause my PC
> freezes between-whiles. Memtest does the same during test 5(block move)
> when egamining 1st MB of it(you can set which part of memory you want to
> check). And my questions is, how can i disable this first MB from being
> used by system? I was thinking of setting ramfs in this 1st MB and then not
> using it, but is it possible?
>

no

You could switch the ram sticks if you have several and disable everything 
above a certain size, but when the error is in the first mb, you could also 
just throw it away.

Ram is cheap at the moment, get new one or RMA the old.

Since memtest does not find a lot of errors, there is a big chance, that even 
more of the ram is defective, you should spare you the trouble.
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Re: [gentoo-user] Re: [OT] Disable memory

[b.n.]

> I think you have misunedstood me. My memory is bad for sure, beacause my PC 
> freezes between-whiles. Memtest does the same during test 5(block move) when 
> egamining 1st MB of it(you can set which part of memory you want to check). 
> And my questions is, how can i disable this first MB from being used by 
> system? I was thinking of setting ramfs in this 1st MB and then not using it, 
> but is it possible?
> 

Try to check this:
http://rick.vanrein.org/linux/badram/

m.
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[gentoo-user] Re: [OT] Disable memory

[Peper]

> Try to check this:
> http://rick.vanrein.org/linux/badram/

I'll give it a try. Thanks!

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Peper
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Re: [gentoo-user] [OT] Disable memory

[Urs Schuetz]

On Sun, 13 Nov 2005, Peper wrote:

> Hello,
> Is there anyway to disable specific part of memory? memtest86
> freezes only when egzamining first MB of it.

As a boot option for the kernel (e.g. /etc/lilo.conf):
append="mem=exactmap mem=640k@0 247M@1M 8M@248M"

Somehing like this worked with older kernels, don't know how to
do it with 2.6 kernels.

Urs

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[gentoo-user] Re: [OT] Disable memory

[Peper]

> As a boot option for the kernel (e.g. /etc/lilo.conf):
> append="mem=exactmap mem=640k@0 247M@1M 8M@248M"
>
> Somehing like this worked with older kernels, don't know how to
> do it with 2.6 kernels.
I have found somewhere that in 2.6 mem changed to memmap, but i'm not sure if 
it works in default kernel. Anyway what are those 3 parts in your 
example(640k 257M 8M)?

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Peper
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