From patchwork Wed Mar 6 19:00:03 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandre Ghiti X-Patchwork-Id: 10841637 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id EF0C01575 for ; Wed, 6 Mar 2019 19:02:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DDF3F2EA16 for ; Wed, 6 Mar 2019 19:02:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D1A372EA19; Wed, 6 Mar 2019 19:02:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 936832EA16 for ; Wed, 6 Mar 2019 19:02:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730387AbfCFTCs (ORCPT ); Wed, 6 Mar 2019 14:02:48 -0500 Received: from relay9-d.mail.gandi.net ([217.70.183.199]:57965 "EHLO relay9-d.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726917AbfCFTCs (ORCPT ); Wed, 6 Mar 2019 14:02:48 -0500 X-Originating-IP: 79.86.19.127 Received: from alex.numericable.fr (127.19.86.79.rev.sfr.net [79.86.19.127]) (Authenticated sender: alex@ghiti.fr) by relay9-d.mail.gandi.net (Postfix) with ESMTPSA id 98D4EFF804; Wed, 6 Mar 2019 19:02:28 +0000 (UTC) From: Alexandre Ghiti To: Vlastimil Babka , Catalin Marinas , Will Deacon , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Martin Schwidefsky , Heiko Carstens , Yoshinori Sato , Rich Felker , "David S . Miller" , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H . Peter Anvin" , x86@kernel.org, Dave Hansen , Andy Lutomirski , Peter Zijlstra , Mike Kravetz , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-mm@kvack.org Cc: Alexandre Ghiti Subject: [PATCH v5 2/4] sparc: Advertise gigantic page support Date: Wed, 6 Mar 2019 14:00:03 -0500 Message-Id: <20190306190005.7036-3-alex@ghiti.fr> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190306190005.7036-1-alex@ghiti.fr> References: <20190306190005.7036-1-alex@ghiti.fr> MIME-Version: 1.0 Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP sparc actually supports gigantic pages and selecting ARCH_HAS_GIGANTIC_PAGE allows it to allocate and free gigantic pages at runtime. sparc allows configuration such as huge pages of 16GB, pages of 8KB and MAX_ORDER = 13 (default): HPAGE_SHIFT (34) - PAGE_SHIFT (13) = 21 >= MAX_ORDER (13) Signed-off-by: Alexandre Ghiti Acked-by: David S. Miller --- arch/sparc/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index d5dd652fb8cc..0b7f0e0fefa5 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -90,6 +90,7 @@ config SPARC64 select ARCH_CLOCKSOURCE_DATA select ARCH_HAS_PTE_SPECIAL select PCI_DOMAINS if PCI + select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA config ARCH_DEFCONFIG string