linux-kernel - Re: [PATCH 1/2] mm: rename mm->nr_ptes to mm->nr

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Date:	Wed, 14 Jan 2015 00:43:55 +0300
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Hugh Dickins <hughd@...gle.com>, linux-mm@...ck.org,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Pavel Emelyanov <xemul@...nvz.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] mm: rename mm->nr_ptes to mm->nr_pgtables

On Tue, Jan 13, 2015 at 09:14:15PM +0200, Kirill A. Shutemov wrote:
> We're going to account pmd page tables too. Let's rename mm->nr_pgtables
> to something more generic.
> 
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> --- a/fs/proc/task_mmu.c
> +++ b/fs/proc/task_mmu.c
> @@ -64,7 +64,7 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
>  		data << (PAGE_SHIFT-10),
>  		mm->stack_vm << (PAGE_SHIFT-10), text, lib,
>  		(PTRS_PER_PTE * sizeof(pte_t) *
> -		 atomic_long_read(&mm->nr_ptes)) >> 10,
> +		 atomic_long_read(&mm->nr_pgtables)) >> 10,

This implies that (PTRS_PER_PTE * sizeof(pte_t)) = (PTRS_PER_PMD * sizeof(pmd_t))
which might be true for all archs, right?

Other looks good to me.
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