From patchwork Sat Mar 25 06:08:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Rapoport X-Patchwork-Id: 13187593 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A25A4C6FD1F for ; Sat, 25 Mar 2023 06:09:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232132AbjCYGJA (ORCPT ); Sat, 25 Mar 2023 02:09:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55180 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232051AbjCYGI6 (ORCPT ); Sat, 25 Mar 2023 02:08:58 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EED31D31F; Fri, 24 Mar 2023 23:08:53 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 7CE56608D6; Sat, 25 Mar 2023 06:08:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 57BBCC433A1; Sat, 25 Mar 2023 06:08:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1679724532; bh=q7weBGPKvdBN57QUvQqtX5qaYPsIxnfEd8OnKmhnqdA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aYeiwpTrkkJSoEHTClUYXh4nHZxJy302IUQShQ1+6oY9htGMebu05MOB8El++8aFl 9kCWkyoZ/NML2PAjmMmc4A5JpN38TO8oYGUYnvDm1H6fl9IpQDJ+NIcfkLm0XwFidr 80fb1ox0I0Yo50ZNJuGe5yWch+qD5lyfJ2xzsL/vbY+y99KvrhTR/W9Poz/7bbebnv PXunooBfRF/+I8gx0SdK9ETB18c8PAoKpngxhYzuLdXTD4xHXE6Gshk98q/uM5eTfF 8ncadKj3TNKIfpB9PowlEDog5VRxNH3tb+JxbTmnfv5hOhsDVZT7BkwYOua/02Zyo6 Mh7TJGdi+dn8w== From: Mike Rapoport To: Andrew Morton Cc: Arnd Bergmann , Catalin Marinas , Christophe Leroy , "David S. Miller" , Dinh Nguyen , Geert Uytterhoeven , Guo Ren , John Paul Adrian Glaubitz , "Kirill A. Shutemov" , Max Filippov , Michael Ellerman , Mike Rapoport , Rich Felker , Russell King , Will Deacon , Yoshinori Sato , Zi Yan , linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mm@kvack.org, linux-sh@vger.kernel.org, linux-xtensa@linux-xtensa.org, linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org Subject: [PATCH v3 01/14] arm: reword ARCH_FORCE_MAX_ORDER prompt and help text Date: Sat, 25 Mar 2023 09:08:15 +0300 Message-Id: <20230325060828.2662773-2-rppt@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20230325060828.2662773-1-rppt@kernel.org> References: <20230325060828.2662773-1-rppt@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org From: "Mike Rapoport (IBM)" The prompt and help text of ARCH_FORCE_MAX_ORDER are not even close to describe this configuration option. Update both to actually describe what this option does. Acked-by: Kirill A. Shutemov Reviewed-by: Zi Yan Signed-off-by: Mike Rapoport (IBM) --- arch/arm/Kconfig | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 929e646e84b9..0b15384c62e6 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1354,17 +1354,19 @@ config ARM_MODULE_PLTS configurations. If unsure, say y. config ARCH_FORCE_MAX_ORDER - int "Maximum zone order" + int "Order of maximal physically contiguous allocations" default "11" if SOC_AM33XX default "8" if SA1111 default "10" help - The kernel memory allocator divides physically contiguous memory - blocks into "zones", where each zone is a power of two number of - pages. This option selects the largest power of two that the kernel - keeps in the memory allocator. If you need to allocate very large - blocks of physically contiguous memory, then you may need to - increase this value. + The kernel page allocator limits the size of maximal physically + contiguous allocations. The limit is called MAX_ORDER and it + defines the maximal power of two of number of pages that can be + allocated as a single contiguous block. This option allows + overriding the default setting when ability to allocate very + large blocks of physically contiguous memory is required. + + Don't change if unsure. config ALIGNMENT_TRAP def_bool CPU_CP15_MMU