Re: [Xen-devel] [PATCH 5/5] x86/boot: Move/copy sections more efficiently

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 05.06.15 at 15:31, <andrew.cooper3@xxxxxxxxxx> wrote:
> Both the trampoline copy and BSS initialise can be performed more efficiently
> by using 4-byte varients of the string operations.

On second thought I'm actually not convinced of this: With
X86_FEATURE_ERMS using byte MOVS/STOS is supposedly
preferred.

> --- a/xen/arch/x86/xen.lds.S
> +++ b/xen/arch/x86/xen.lds.S
> @@ -153,11 +153,13 @@ SECTIONS
>         __xsm_initcall_start = .;
>         *(.xsm_initcall.init)
>         __xsm_initcall_end = .;
> +
> +       . = ALIGN(PAGE_SIZE);
>    } :text
> -  . = ALIGN(STACK_SIZE);
>    __init_end = .;

Perhaps worth also moving the symbol into the section?

Jan


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