From patchwork Tue Dec 7 03:07:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Baoquan He X-Patchwork-Id: 12660985 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 C889FC433EF for ; Tue, 7 Dec 2021 03:08:45 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 2BAFE6B0085; Mon, 6 Dec 2021 22:08:27 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 2688E6B0088; Mon, 6 Dec 2021 22:08:27 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 1589A6B0089; Mon, 6 Dec 2021 22:08:27 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0157.hostedemail.com [216.40.44.157]) by kanga.kvack.org (Postfix) with ESMTP id 086816B0085 for ; Mon, 6 Dec 2021 22:08:27 -0500 (EST) Received: from smtpin14.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id CB6328249980 for ; Tue, 7 Dec 2021 03:08:16 +0000 (UTC) X-FDA: 78889514592.14.3B47088 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by imf22.hostedemail.com (Postfix) with ESMTP id 646021901 for ; Tue, 7 Dec 2021 03:08:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1638846495; 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=jUbE4CK0eet9PmMxw+dX7O/FbQGFA6iLZxTktNvrq6G32qHjrrPVl+tggvCOX2Esib5dWh g1GKzGSmexNOwE/MPI/4cokn/eC6qdV7y38rd1Mk4BVLk4pKwAkSWsNyAwTnPJK84trs2A 5DPjwwkXx/xZzjLbBLib+XF1NGC7pAY= 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-384-yk4ATuKZNHC5lG-OSBoing-1; Mon, 06 Dec 2021 22:08:10 -0500 X-MC-Unique: yk4ATuKZNHC5lG-OSBoing-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 1D182802924; Tue, 7 Dec 2021 03:08:09 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (ovpn-12-87.pek2.redhat.com [10.72.12.87]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9D24819C59; Tue, 7 Dec 2021 03:08:02 +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, John.p.donnelly@oracle.com, kexec@lists.infradead.org, Baoquan He Subject: [PATCH RESEND v2 1/5] docs: kernel-parameters: Update to reflect the current default size of atomic pool Date: Tue, 7 Dec 2021 11:07:46 +0800 Message-Id: <20211207030750.30824-2-bhe@redhat.com> In-Reply-To: <20211207030750.30824-1-bhe@redhat.com> References: <20211207030750.30824-1-bhe@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 646021901 X-Stat-Signature: 9sr866ci78u5t3uzw968ygdj944fijnb Authentication-Results: imf22.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=jUbE4CK0; dmarc=pass (policy=none) header.from=redhat.com; spf=none (imf22.hostedemail.com: domain of bhe@redhat.com has no SPF policy when checking 170.10.133.124) smtp.mailfrom=bhe@redhat.com X-HE-Tag: 1638846496-556859 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: