From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933440AbcFMShQ (ORCPT ); Mon, 13 Jun 2016 14:37:16 -0400 Received: from mail-wm0-f65.google.com ([74.125.82.65]:34878 "EHLO mail-wm0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751598AbcFMShO (ORCPT ); Mon, 13 Jun 2016 14:37:14 -0400 Date: Mon, 13 Jun 2016 21:37:07 +0300 From: Ebru Akagunduz To: linux-mm@kvack.org Cc: hughd@google.com, riel@redhat.com, akpm@linux-foundation.org, kirill.shutemov@linux.intel.com, n-horiguchi@ah.jp.nec.com, aarcange@redhat.com, iamjoonsoo.kim@lge.com, gorcunov@openvz.org, linux-kernel@vger.kernel.org, mgorman@suse.de, rientjes@google.com, vbabka@suse.cz, aneesh.kumar@linux.vnet.ibm.com, hannes@cmpxchg.org, mhocko@suse.cz, boaz@plexistor.com, minchan@kernel.org Subject: Re: [RFC PATCH 3/3] doc: add information about min_ptes_young Message-ID: <20160613183707.GD3815@debian> References: <1465672561-29608-1-git-send-email-ebru.akagunduz@gmail.com> <1465672561-29608-4-git-send-email-ebru.akagunduz@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1465672561-29608-4-git-send-email-ebru.akagunduz@gmail.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Jun 11, 2016 at 10:16:01PM +0300, Ebru Akagunduz wrote: > min_ptes_young specifies at least how many young pages needed > to create a THP. This threshold also effects when making swapin > readahead (if needed) to create a THP. We decide whether to make > swapin readahed wortwhile looking the value. > > /sys/kernel/mm/transparent_hugepage/khugepaged/min_ptes_young > > Signed-off-by: Ebru Akagunduz Suggested-by: Minchan Kim > --- Cc'ed Minchan Kim. > Documentation/vm/transhuge.txt | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/Documentation/vm/transhuge.txt b/Documentation/vm/transhuge.txt > index 2ec6adb..0ae713b 100644 > --- a/Documentation/vm/transhuge.txt > +++ b/Documentation/vm/transhuge.txt > @@ -193,6 +193,13 @@ memory. A lower value can prevent THPs from being > collapsed, resulting fewer pages being collapsed into > THPs, and lower memory access performance. > > +min_ptes_young specifies at least how many young pages needed > +to create a THP. This threshold also effects when making swapin > +readahead (if needed) to create a THP. We decide whether to make > +swapin readahed wortwhile looking the value. > + > +/sys/kernel/mm/transparent_hugepage/khugepaged/min_ptes_young > + > == Boot parameter == > > You can change the sysfs boot time defaults of Transparent Hugepage > -- > 1.9.1 >