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Re: [Xen-ia64-devel] [RFC] Change .config of dom0 for

from [Alex Williamson]

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To:	Akio Takebe <takebe_akio@xxxxxxxxxxxxxx>
Subject:	Re: [Xen-ia64-devel] [RFC] Change .config of dom0 for
From:	Alex Williamson <alex.williamson@xxxxxx>
Date:	Wed, 17 Jan 2007 17:13:54 -0700
Cc:	ia64 Fedora Core Development <fedora-ia64-list@xxxxxxxxxx>, xen-ia64-devel <xen-ia64-devel@xxxxxxxxxxxxxxxxxxx>
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On Thu, 2007-01-18 at 09:10 +0900, Akio Takebe wrote:
> Hi, Isaku and all
> 
> When I boot dom0 with dom0_mem=31G, dom0 use about 2GB memory after booting.
> I check why dom0 use 2GB, then I found the following message at the boot time.
> 
>  Aperture:     64 megabytes
>  Kernel range: 0xe0000000052b4000 - 0xe0000000092b4000
>  Address size: 30 bits
> Memory: 30649984k/32456704k available (10480k code, 1805472k reserved, 4361k 
> data, 288k init) <------- !!!reserved 1.8GB!!!
> McKinley Errata 9 workaround not needed; disabling it
...
> 
> Should we change .config of dom0?
> Or should we fix other code?
> 
> I think we should change .confing,
> I use CONFIG_DISCONTIGMEM and CONFIG_VIRTUAL_MEM_MAP,
> but we may use SPARSEMEM.
> (I'll check SPARSEMEM soon.)

   I agree, we're presenting dom0 with a memory map similar to bare
metal hardware.  The contiguous memory handlers aren't going to be able
to deal with that efficiently on many ia64 platforms.  Thanks,

        Alex

-- 
Alex Williamson                             HP Open Source & Linux Org.


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