From: Vivek Goyal Date: Thu, 7 Dec 2006 01:14:04 +0000 (+0100) Subject: [PATCH] i386: Implement CONFIG_PHYSICAL_ALIGN X-Git-Tag: v2.6.20-rc1~145^2^2~8^2~108 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e69f202d0a1419219198566e1c22218a5c71a9a6;p=pandora-kernel.git [PATCH] i386: Implement CONFIG_PHYSICAL_ALIGN o Now CONFIG_PHYSICAL_START is being replaced with CONFIG_PHYSICAL_ALIGN. Hardcoding the kernel physical start value creates a problem in relocatable kernel context due to boot loader limitations. For ex, if somebody compiles a relocatable kernel to be run from address 4MB, but this kernel will run from location 1MB as grub loads the kernel at physical address 1MB. Kernel thinks that I am a relocatable kernel and I should run from the address I have been loaded at. So somebody wanting to run kernel from 4MB alignment location (for improved performance regions) can't do that. o Hence, Eric proposed that probably CONFIG_PHYSICAL_ALIGN will make more sense in relocatable kernel context. At run time kernel will move itself to a physical addr location which meets user specified alignment restrictions. Signed-off-by: Vivek Goyal Signed-off-by: Andi Kleen --- Reading git-diff-tree failed