Re: [PATCH] A new entry for /proc

[Marcelo Tosatti <marcelo.tosatti@cyclades.com>]

Hi Mauricio,

On Mon, Jan 17, 2005 at 03:02:14PM -0400, Mauricio Lin wrote:
> Hi Andrew,
> 
> I figured out the error. This patch works for others editors as well.

<snip>

> diff -uprN linux-2.6.10/fs/proc/task_mmu.c linux-2.6.10-smaps/fs/proc/task_mmu.c
> --- linux-2.6.10/fs/proc/task_mmu.c	2004-12-24 17:34:01.000000000 -0400
> +++ linux-2.6.10-smaps/fs/proc/task_mmu.c	2005-01-17 14:55:17.000000000 -0400
> @@ -81,6 +81,76 @@ static int show_map(struct seq_file *m, 
>  	return 0;
>  }
>  
> +static void resident_mem_size(struct mm_struct *mm,
> +			      unsigned long start_address,
> +			      unsigned long end_address,
> +			      unsigned long *size)
> +{
> +	pgd_t *pgd;
> +	pmd_t *pmd;
> +	pte_t *ptep, pte;
> +	unsigned long each_page;
> +
> +	for (each_page = start_address; each_page < end_address; 
> +	     each_page += PAGE_SIZE) {
> +		pgd = pgd_offset(mm, each_page);
> +		if (pgd_none(*pgd) || unlikely(pgd_bad(*pgd)))
> +			continue;
> +
> +		pmd = pmd_offset(pgd, each_page);
> +
> +		if (pmd_none(*pmd))
> +			continue;
> +
> +		if (unlikely(pmd_bad(*pmd)))
> +			continue;
> +
> +		if (pmd_present(*pmd)) {
> +			ptep = pte_offset_map(pmd, each_page);
> +			if (!ptep)
> +				continue;
> +			pte = *ptep;
> +			pte_unmap(ptep);
> +			if (pte_present(pte))
> +				*size += PAGE_SIZE;
> +		}
> +	}
> +}

You want to update your patch to handle the new 4level pagetables which introduces
a new indirection table: the PUD. 

Check 2.6.11-rc1 - mm/rmap.c.

BTW: What does PUD stand for?