Re: [PATCH 2/2] mm: mark fault_around_bytes __read_mostly

[David Rientjes <rientjes@google.com>]

On Tue, 29 Jul 2014, Kirill A. Shutemov wrote:

> fault_around_bytes can only be changed via debugfs. Let's mark it
> read-mostly.
> 
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>

Suggested-by: David Rientjes <rientjes@google.com>
Acked-by: David Rientjes <rientjes@google.com>

> ---
>  mm/memory.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/mm/memory.c b/mm/memory.c
> index 2ce07dc9b52b..ed3073d6a0e0 100644
> --- a/mm/memory.c
> +++ b/mm/memory.c
> @@ -2768,7 +2768,8 @@ void do_set_pte(struct vm_area_struct *vma, unsigned long address,
>  	update_mmu_cache(vma, address, pte);
>  }
>  
> -static unsigned long fault_around_bytes = rounddown_pow_of_two(65536);
> +static unsigned long fault_around_bytes __read_mostly =
> +	rounddown_pow_of_two(65536);
>  
>  static inline unsigned long fault_around_pages(void)
>  {

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