From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753958AbbIROkX (ORCPT ); Fri, 18 Sep 2015 10:40:23 -0400 Received: from mx1.redhat.com ([209.132.183.28]:51587 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751770AbbIROkS (ORCPT ); Fri, 18 Sep 2015 10:40:18 -0400 Message-ID: <55FC224F.2020308@redhat.com> Date: Fri, 18 Sep 2015 10:40:15 -0400 From: Rik van Riel User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0 MIME-Version: 1.0 To: Ebru Akagunduz , linux-mm@kvack.org CC: akpm@linux-foundation.org, rientjes@google.com, oleg@redhat.com, kirill.shutemov@linux.intel.com, dave@stgolabs.net, denc716@gmail.com, ldufour@linux.vnet.ibm.com, sasha.levin@oracle.com, viro@zeniv.linux.org.uk, linux-kernel@vger.kernel.org Subject: Re: [PATCH] doc: add information about max_ptes_swap References: <1442525698-22598-1-git-send-email-ebru.akagunduz@gmail.com> In-Reply-To: <1442525698-22598-1-git-send-email-ebru.akagunduz@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/17/2015 05:34 PM, Ebru Akagunduz wrote: > max_ptes_swap specifies how many pages can be brought in from > swap when collapsing a group of pages into a transparent huge page. > > /sys/kernel/mm/transparent_hugepage/khugepaged/max_ptes_swap > > A higher value can cause excessive swap IO and waste > memory. A lower value can prevent THPs from being > collapsed, resulting fewer pages being collapsed into > THPs, and lower memory access performance. > > Signed-off-by: Ebru Akagunduz Acked-by: Rik van Riel -- All rights reversed