Re: BOOT_CS

From: Etienne Lorrain (etienne_lorrain_at_yahoo.fr)
Date: 02/24/04

  • Next message: Coywolf Qi Hunt: "Re: [PATCH] Remove the extra jmp" 
    Date:	Tue, 24 Feb 2004 11:05:30 +0100 (CET)
To: linux-kernel@vger.kernel.org

    > H. Peter Anvin writes:
    > > Eric W. Biederman wrote:
    > > for those folks who want to place their ramdisk as low
    > > in memory as possible?
    > The problem is that you don't know until it's too late, since it can
    > depend on dynamic factors. This is part of why your insistence of
    > putting the ramdisk in the "most incorrect" position is simply wrong.

      The other problem is for the people who want to check the validity
     of the RAM disk before starting Linux - for instance by checking
     the CRC32 of the decompressed RAM disk - and stop the boot process
     before it is too late - i.e. in the bootloader when you can select
     another kernel version / initrd to load.
      You cannot place the decompressed initrd at a maximum address before
     knowing its decompressed size - the address to place it is the max
     address (or the end of free RAM) minus ramdisk size if I remember
     correctly. That is working for so long loading the decompressed
     initrd after few Mb after the last kernel byte (so that the kernel
     will move it where it wants - no need to move it twice) that I do
     not remember the details. Did you changed this part?

      Etienne.

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  • Next message: Coywolf Qi Hunt: "Re: [PATCH] Remove the extra jmp"

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