On Tuesday 03 October 2006 19:06, Vivek Goyal wrote:
>
> o Currently there is no specific alignment restriction in linker script
> and in some cases it can be placed non 4K aligned addresses. This fails
> kexec which checks that segment to be loaded is page aligned.
>
> o I guess, it does not harm data segment to be 4K aligned.
iirc P4 optimization guide even recommends to keep writable data
away one page from code to avoid some cache invalidations. But:
> diff -puN
> arch/i386/kernel/vmlinux.lds.S~i386-force-data-section-to-4K-aligned
> arch/i386/kernel/vmlinux.lds.S
> ---
> linux-2.6.18-git17/arch/i386/kernel/vmlinux.lds.S~i386-force-data-section-to-4K-aligned
> 2006-10-02 13:17:58.000000000 -0400
> +++ linux-2.6.18-git17-root/arch/i386/kernel/vmlinux.lds.S 2006-10-02
> 14:38:17.000000000 -0400
> @@ -52,6 +52,7 @@ SECTIONS
> }
>
> /* writeable */
> + . = ALIGN(4096);
> .data : AT(ADDR(.data) - LOAD_OFFSET) { /* Data */
> *(.data)
> CONSTRUCTORS
I would move the ".tracedata" section behind it first.
-Andi
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