From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751294AbdBWQeS (ORCPT ); Thu, 23 Feb 2017 11:34:18 -0500 Received: from shards.monkeyblade.net ([184.105.139.130]:43864 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751098AbdBWQeR (ORCPT ); Thu, 23 Feb 2017 11:34:17 -0500 Date: Thu, 23 Feb 2017 11:32:18 -0500 (EST) Message-Id: <20170223.113218.2219144071313988229.davem@davemloft.net> To: nitin.m.gupta@oracle.com Cc: mike.kravetz@oracle.com, akpm@linux-foundation.org, julian.calaby@gmail.com, hughd@google.com, adam.buchbinder@gmail.com, kirill.shutemov@linux.intel.com, sfr@canb.auug.org.au, paul.gortmaker@windriver.com, thomas.tai@oracle.com, chris.hyser@oracle.com, khalid.aziz@oracle.com, atish.patra@oracle.com, mhocko@suse.com, sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v6] sparc64: Multi-page size support From: David Miller In-Reply-To: <1485994656-115830-1-git-send-email-nitin.m.gupta@oracle.com> References: <1485994656-115830-1-git-send-email-nitin.m.gupta@oracle.com> X-Mailer: Mew version 6.7 on Emacs 24.5 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Thu, 23 Feb 2017 07:33:27 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Nitin Gupta Date: Wed, 1 Feb 2017 16:16:36 -0800 > Add support for using multiple hugepage sizes simultaneously > on mainline. Currently, support for 256M has been added which > can be used along with 8M pages. > > Page tables are set like this (e.g. for 256M page): > VA + (8M * x) -> PA + (8M * x) (sz bit = 256M) where x in [0, 31] > > and TSB is set similarly: > VA + (4M * x) -> PA + (4M * x) (sz bit = 256M) where x in [0, 63] > > - Testing > > Tested on Sonoma (which supports 256M pages) by running stream > benchmark instances in parallel: one instance uses 8M pages and > another uses 256M pages, consuming 48G each. > > Boot params used: > > default_hugepagesz=256M hugepagesz=256M hugepages=300 hugepagesz=8M > hugepages=10000 > > Signed-off-by: Nitin Gupta Applied, thanks.