linux-kernel - Re: [PATCH] doc: add information about max_ptes

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Message-ID: <20150227151444.05ce1b31@lwn.net>
Date:	Fri, 27 Feb 2015 15:14:44 -0700
From:	Jonathan Corbet <corbet@....net>
To:	Ebru Akagunduz <ebru.akagunduz@...il.com>
Cc:	linux-mm@...ck.org, riel@...hat.com, mgorman@...e.de,
	hughd@...gle.com, kirill.shutemov@...ux.intel.com,
	akpm@...ux-foundation.org, dave@...olabs.net, aulmcquad@...il.com,
	sasha.levin@...cle.com, xemul@...allels.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] doc: add information about max_ptes_none

On Thu, 26 Feb 2015 23:34:36 +0200
Ebru Akagunduz <ebru.akagunduz@...il.com> wrote:

> max_ptes_none specifies how many extra small pages (that are
> not already mapped) can be allocated when collapsing a group
> of small pages into one large page.
> 
> /sys/kernel/mm/transparent_hugepage/khugepaged/max_ptes_none
> 
> A higher value leads to use additional memory for programs.
> A lower value leads to gain less thp performance. Value of
> max_ptes_none can waste cpu time very little, you can
> ignore it.

Applied to the docs tree, thanks.

jon
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