Re: [PATCH] reserve_early end-of-conventional-memory to 1MB
From: H. Peter Anvin
Date: Mon Feb 25 2008 - 16:18:20 EST
Alexander van Heukelum wrote:
Hello hpa,
I failed to find a comment referring to 0x413 or int 0x12 in
arch/x86/kernel. I do know the comment in Documentation/i386/boot.txt,
however, suggesting that "INT 12h" _should_ be used, but that it would
be pointless for zImage and old bzImage kernels, because they _have_
to be started from 0x90000 anyway. New bzImage kernels do not have
this limitation, and smart bootloaders simply put them at much
lower addresses, like 0x40000. (I know: you know.) My point is just
that the argument not to use 0x413 in the bootloader is not valid
for this case.
OK, let me see if I can dig up the comment I thought I found at one
point, and maybe found out the history behind it. Either that, or find
out that my memory is faulty ;)
-hpa
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