Re: VM_AREA size

From: H. Peter Anvin (hpa_at_zytor.com)
Date: 01/14/04

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    Date:	Wed, 14 Jan 2004 10:57:51 -0800
To: Hugh Dickins <hugh@veritas.com>

    Hugh Dickins wrote:
    > On Wed, 14 Jan 2004, Mark Hounschell wrote:
    >
    >>What would the ramifications be of increasing VM_AREA size in
    >>include/asm-i386/page.h from 128mb to 256mb. What would be the proper way to
    >>increase this if the above isn't?
    >
    > I think you mean __VMALLOC_RESERVE? For the most part it's straightforward
    > to bump it up. _However_, that breaks boot loader assumptions about where
    > to load initrd, causing mayhem in that case (and initramfs?). That's
    > second hand info: if I'm wrong or out-of-date, Peter is the authority
    > and will correct me; or try Google VMALLOC_RESERVE boot.
    >

    I think it affects initramfs too.

    It only affects boot loaders which don't support version 2.03 of the
    boot protocol; unfortunately that includes GRUB last I checked.

    We really need a better dialog with the GRUB people, unfortunately at
    least I have unsuccessful in starting such a dialog.

    GRUB, in particular, needs to report the boot loader ID they're using,
    plus support version 2.03 of the protocol.

            -hpa

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