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SubjectRe: [PATCH 1/2] boot: increase stack size for kernel boot loader decompressor
On Fri, Apr 04, 2008 at 06:30:15PM -0700, Mike Travis wrote:
> * Increase stack size for the kernel bootloader decompressor. This is
> needed to boot a kernel with NR_CPUS = 4096. I tested with 8k stack
> size but that wasn't sufficient.
>
> Based on:
> git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
> + x86/latest .../x86/linux-2.6-x86.git
> + sched-devel/latest .../mingo/linux-2.6-sched-devel.git
>
> Signed-off-by: Mike Travis <travis@sgi.com>
> ---
> arch/x86/boot/compressed/head_64.S | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> --- linux-2.6.25-rc5.orig/arch/x86/boot/compressed/head_64.S
> +++ linux-2.6.25-rc5/arch/x86/boot/compressed/head_64.S
> @@ -314,5 +314,5 @@ gdt_end:
> /* Stack for uncompression */
> .balign 4
> user_stack:
> - .fill 4096,4,0
> + .fill 16384,4,0
--------------^^^ * ^

Changed from 16K to 64K. I wonder what is using so much space on
this stack?

> user_stack_end:
>
> --


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