On Tue, May 10, 2005 at 02:44:47PM -0700, Christoph Lameter wrote:
> On Tue, 10 May 2005, Andi Kleen wrote:
>
> > Better just add the section to x86-64. Should be easy by copying the
> > change from the i386 patch.
>
> Something like this?
>
> Index: linux-2.6.11/arch/x86_64/kernel/vmlinux.lds.S
> ===================================================================
> --- linux-2.6.11.orig/arch/x86_64/kernel/vmlinux.lds.S 2005-05-10 13:35:24.000000000 -0700
> +++ linux-2.6.11/arch/x86_64/kernel/vmlinux.lds.S 2005-05-10 13:44:26.000000000 -0700
> @@ -42,6 +42,13 @@ SECTIONS
> CONSTRUCTORS
> }
>
> + . = ALIGN(32);
This should be . = ALIGN(CONFIG_X86_L1_CACHE_BYTES)
It was wrong on i386 already btw, which needs the same.
> + .data.cacheline_aligned : { (.data.cacheline_aligned) }
> +
> + /* Rarely changed data like cpu maps */
> + . = ALIGN(4096);
Does it really need an 4096 byte alignment? That seems like
a waste of memory. Cache line alignment should be enough.
> + .data.mostly_readonly : { *(.data.mostly_readonly) }
> +
> _edata = .; /* End of data section */
>
> __bss_start = .; /* BSS */
>
> > Ideally it would be asm-generic/vmlinux.lds and cover everybody...
>
> Hmm.. Add a definition for ALIGNED_DATA ?
Thinking about it again there is no portable way to do the cacheline
alignment yet, so drop that suggestion please.
-Andi
>
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