linux-kernel - Re: [PATCH v3 01/13] mm/pagewalk: remove pgd_entry() and pud

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Message-ID: <20140630102306.GA19833@node.dhcp.inet.fi>
Date:	Mon, 30 Jun 2014 13:23:06 +0300
From:	"Kirill A. Shutemov" <kirill@...temov.name>
To:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
Cc:	linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
	Dave Hansen <dave.hansen@...el.com>,
	Hugh Dickins <hughd@...gle.com>, linux-kernel@...r.kernel.org,
	Naoya Horiguchi <nao.horiguchi@...il.com>
Subject: Re: [PATCH v3 01/13] mm/pagewalk: remove pgd_entry() and pud_entry()

On Fri, Jun 20, 2014 at 04:11:27PM -0400, Naoya Horiguchi wrote:
> Currently no user of page table walker sets ->pgd_entry() or ->pud_entry(),
> so checking their existence in each loop is just wasting CPU cycle.
> So let's remove it to reduce overhead.
> 
> Signed-off-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>

Acked-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
-- 
 Kirill A. Shutemov
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