From patchwork Tue Aug 10 09:48:31 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baoquan He X-Patchwork-Id: 12428551 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 55AF3C4338F for ; Tue, 10 Aug 2021 09:48:57 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D7B34610A7 for ; Tue, 10 Aug 2021 09:48:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org D7B34610A7 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 6D3C56B0072; Tue, 10 Aug 2021 05:48:56 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6847D8D0001; Tue, 10 Aug 2021 05:48:56 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 573D16B0074; Tue, 10 Aug 2021 05:48:56 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0064.hostedemail.com [216.40.44.64]) by kanga.kvack.org (Postfix) with ESMTP id 42F906B0072 for ; Tue, 10 Aug 2021 05:48:56 -0400 (EDT) Received: from smtpin05.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id D9F2D20308 for ; Tue, 10 Aug 2021 09:48:55 +0000 (UTC) X-FDA: 78458697030.05.6F1BEF1 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by imf05.hostedemail.com (Postfix) with ESMTP id 8B88B5043BE3 for ; Tue, 10 Aug 2021 09:48:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1628588935; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:in-reply-to:in-reply-to:references:references; bh=gxvJrIXCAPVngRCoulL08SruZXEWluc1auUZjvsayVg=; b=GxD75sYNCVPA/WK/exF4zuj+ezrhgnbcVpztxPNu/4JJoerVeHku1ep07vtjC2rFQR3xl9 LZBKlQ8o4f5KAhVG2WdRCL7lsSfB/j/I49mh459TW6FD0twK6PA+nbZFXf2Ao9rieETxTh 8VAIJDP9P0HCmv1kzaMLUK17cywS4Ow= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-474-pm95iwqfM_qMasqi8y-IJg-1; Tue, 10 Aug 2021 05:48:51 -0400 X-MC-Unique: pm95iwqfM_qMasqi8y-IJg-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 066D939384; Tue, 10 Aug 2021 09:48:50 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (ovpn-12-79.pek2.redhat.com [10.72.12.79]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4FA1610013C1; Tue, 10 Aug 2021 09:48:45 +0000 (UTC) From: Baoquan He To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, akpm@linux-foundation.org, hch@lst.de, robin.murphy@arm.com, cl@linux.com, penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com, vbabka@suse.cz, m.szyprowski@samsung.com, rppt@linux.ibm.com, Baoquan He Subject: [RFC PATCH v2 1/5] docs: kernel-parameters: Update to reflect the current default size of atomic pool Date: Tue, 10 Aug 2021 17:48:31 +0800 Message-Id: <20210810094835.13402-2-bhe@redhat.com> In-Reply-To: <20210810094835.13402-1-bhe@redhat.com> References: <20210810094835.13402-1-bhe@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: imf05.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=GxD75sYN; dmarc=pass (policy=none) header.from=redhat.com; spf=none (imf05.hostedemail.com: domain of bhe@redhat.com has no SPF policy when checking 170.10.133.124) smtp.mailfrom=bhe@redhat.com X-Stat-Signature: pb5a1p3iak8e7fheyqxtu3bp3wzkt7ac X-Rspamd-Queue-Id: 8B88B5043BE3 X-Rspamd-Server: rspam01 X-HE-Tag: 1628588935-320041 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Since commit 1d659236fb43("dma-pool: scale the default DMA coherent pool size with memory capacity"), the default size of atomic pool has been changed to take by scaling with system memory capacity. So update the document in kerenl-parameter.txt accordingly. Signed-off-by: Baoquan He --- Documentation/admin-guide/kernel-parameters.txt | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index bdb22006f713..970ed65db89f 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -653,7 +653,9 @@ coherent_pool=nn[KMG] [ARM,KNL] Sets the size of memory pool for coherent, atomic dma - allocations, by default set to 256K. + allocations. Otherwise the default size will be scaled + with memory capacity, while clamped between 128K and + 1 << (PAGE_SHIFT + MAX_ORDER-1). com20020= [HW,NET] ARCnet - COM20020 chipset Format: