From patchwork Mon Dec 13 12:27:08 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baoquan He X-Patchwork-Id: 12673833 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 7C385C433EF for ; Mon, 13 Dec 2021 12:28:17 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id A0A296B0073; Mon, 13 Dec 2021 07:27:52 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 9BA486B0074; Mon, 13 Dec 2021 07:27:52 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 881BC6B0075; Mon, 13 Dec 2021 07:27:52 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0152.hostedemail.com [216.40.44.152]) by kanga.kvack.org (Postfix) with ESMTP id 7AC096B0073 for ; Mon, 13 Dec 2021 07:27:52 -0500 (EST) Received: from smtpin20.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 443CD83C42 for ; Mon, 13 Dec 2021 12:27:42 +0000 (UTC) X-FDA: 78912697164.20.33E0182 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by imf03.hostedemail.com (Postfix) with ESMTP id D982C2000C for ; Mon, 13 Dec 2021 12:27:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1639398461; 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=22K9MUJhLkdM2hxzj+IO1PvAug0Wxhex9m9iJdE13FM=; b=c2d8zmH50ia6JfmxsS8BHUK0i2MgFOQJ7aG2xYuTWuKJVgUAeN8wn3tZBAp8tS+8+xGXBD 6ARKGHBalwMKa7lmJpTQ0NCLqk45cI7MaAhKuFBJv0yzByszwGISbAGgfQm0vpgLXSVOXJ shcT/UTQMgnsMLCJkoNR0A9pda9YBAE= 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-263-0cwds2UPNM2AojxepPYT1w-1; Mon, 13 Dec 2021 07:27:40 -0500 X-MC-Unique: 0cwds2UPNM2AojxepPYT1w-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id A906D10144E3; Mon, 13 Dec 2021 12:27:38 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (ovpn-12-202.pek2.redhat.com [10.72.12.202]) by smtp.corp.redhat.com (Postfix) with ESMTP id AD40777F29; Mon, 13 Dec 2021 12:27:35 +0000 (UTC) From: Baoquan He To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, akpm@linux-foundation.org, hch@lst.de, cl@linux.com, John.p.donnelly@oracle.com, kexec@lists.infradead.org, bhe@redhat.com Subject: [PATCH v3 1/5] docs: kernel-parameters: Update to reflect the current default size of atomic pool Date: Mon, 13 Dec 2021 20:27:08 +0800 Message-Id: <20211213122712.23805-2-bhe@redhat.com> In-Reply-To: <20211213122712.23805-1-bhe@redhat.com> References: <20211213122712.23805-1-bhe@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: imf03.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=c2d8zmH5; dmarc=pass (policy=none) header.from=redhat.com; spf=none (imf03.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: rspam08 X-Rspamd-Queue-Id: D982C2000C X-Stat-Signature: je6bgymr6rjcxe6r5b9a8tags1swjrm5 X-HE-Tag: 1639398461-889722 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 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: