From patchwork Fri Dec 17 09:08:26 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baoquan He X-Patchwork-Id: 12683931 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 39F2DC433F5 for ; Fri, 17 Dec 2021 09:09:15 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 302B96B0073; Fri, 17 Dec 2021 04:08:51 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 28B5C6B0075; Fri, 17 Dec 2021 04:08:51 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 12B976B0078; Fri, 17 Dec 2021 04:08:51 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0056.hostedemail.com [216.40.44.56]) by kanga.kvack.org (Postfix) with ESMTP id 02FE86B0073 for ; Fri, 17 Dec 2021 04:08:51 -0500 (EST) Received: from smtpin07.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id B4F0218030C8B for ; Fri, 17 Dec 2021 09:08:40 +0000 (UTC) X-FDA: 78926710800.07.8BD793B Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by imf31.hostedemail.com (Postfix) with ESMTP id 970FA20014 for ; Fri, 17 Dec 2021 09:08:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1639732120; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=sT+g3CTtmuJQa5zGo6KTILdE5kw3zymgexb1EZSOqJ0=; b=QYGstFkOebVwVRMLC0rhkJPz2C5yRkn3xEnNPXWjwLZFXzobXgPZwWmT616W2TtjeB1S6g jh7EamUeC3dY1prq051lD/cUAtD4anCk8SJSBfnznSIydCMlXiJnflhyqoEqsAdzRd0Mls tnngD9b9pcgXQcwBbn/jgvAruNEW6e0= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-647-PY05FEHuPQCSFtN73MMsaA-1; Fri, 17 Dec 2021 04:08:36 -0500 X-MC-Unique: PY05FEHuPQCSFtN73MMsaA-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 4F369593A8; Fri, 17 Dec 2021 09:08:35 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (ovpn-12-164.pek2.redhat.com [10.72.12.164]) by smtp.corp.redhat.com (Postfix) with ESMTP id 7E6CD7A488; Fri, 17 Dec 2021 09:08:32 +0000 (UTC) From: Baoquan He To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, akpm@linux-foundation.org, corbet@lwn.net, hch@lst.de, cl@linux.com, bhe@redhat.com Subject: [PATCH 1/2] docs: kernel-parameters: Update to reflect the current default size of atomic pool Date: Fri, 17 Dec 2021 17:08:26 +0800 Message-Id: <20211217090827.101938-2-bhe@redhat.com> In-Reply-To: <20211217090827.101938-1-bhe@redhat.com> References: <20211217090827.101938-1-bhe@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Rspamd-Queue-Id: 970FA20014 X-Stat-Signature: m9yebc6ahmcc7fqqxszo9byae45b6psi Authentication-Results: imf31.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=QYGstFkO; dmarc=pass (policy=none) header.from=redhat.com; spf=none (imf31.hostedemail.com: domain of bhe@redhat.com has no SPF policy when checking 170.10.129.124) smtp.mailfrom=bhe@redhat.com X-Rspamd-Server: rspam02 X-HE-Tag: 1639732112-875590 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 Reviewed-by: Christoph Hellwig --- 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 9725c546a0d4..ec4d25e854a8 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -664,7 +664,9 @@ 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: