From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932930AbbIUWrK (ORCPT ); Mon, 21 Sep 2015 18:47:10 -0400 Received: from mail-pa0-f41.google.com ([209.85.220.41]:36730 "EHLO mail-pa0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932105AbbIUWrJ (ORCPT ); Mon, 21 Sep 2015 18:47:09 -0400 Date: Mon, 21 Sep 2015 15:47:06 -0700 (PDT) From: David Rientjes X-X-Sender: rientjes@chino.kir.corp.google.com To: Ebru Akagunduz cc: linux-mm@kvack.org, riel@redhat.com, akpm@linux-foundation.org, 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 In-Reply-To: <1442525698-22598-1-git-send-email-ebru.akagunduz@gmail.com> Message-ID: References: <1442525698-22598-1-git-send-email-ebru.akagunduz@gmail.com> User-Agent: Alpine 2.10 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 18 Sep 2015, 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: David Rientjes