From mboxrd@z Thu Jan 1 00:00:00 1970 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=-16.1 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 3836BC49EA6 for ; Thu, 24 Jun 2021 05:20:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 17382613E8 for ; Thu, 24 Jun 2021 05:20:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230146AbhFXFWl (ORCPT ); Thu, 24 Jun 2021 01:22:41 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:34021 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230099AbhFXFWk (ORCPT ); Thu, 24 Jun 2021 01:22:40 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1624512021; 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=BkJEwIJHUaKQHMjsGSaBUEMszb7c3JSh80myCWGyHWY=; b=UPzW8GSgl7Abo0GyofT3Nl9/KzAgkzYuOanF0AvUxPLfzq+XqpyHELvsJyr+0wx4HjsJNW lDfxtPfxP6ha8ivCTs7SGM3oAUXJU2odwfhabss71fe/j2WB05LUkA69Efjr3ISNdvpQsh O+VvHS9damft11tSMaorUhmDaHGBCwo= 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-288-qGZhAdPJNi-40Gfv0Q7ZnQ-1; Thu, 24 Jun 2021 01:20:19 -0400 X-MC-Unique: qGZhAdPJNi-40Gfv0Q7ZnQ-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 5E7A48042A8; Thu, 24 Jun 2021 05:20:18 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (ovpn-12-82.pek2.redhat.com [10.72.12.82]) by smtp.corp.redhat.com (Postfix) with ESMTP id 55E9D19D7C; Thu, 24 Jun 2021 05:20:15 +0000 (UTC) From: Baoquan He To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, x86@kernel.org, rientjes@google.com, rppt@linux.ibm.com, thomas.lendacky@amd.com, brijesh.singh@amd.com, kexec@lists.infradead.org, bhe@redhat.com Subject: [PATCH 1/2] docs: kernel-parameters: Update to reflect the current default size of atomic pool Date: Thu, 24 Jun 2021 13:20:09 +0800 Message-Id: <20210624052010.5676-2-bhe@redhat.com> In-Reply-To: <20210624052010.5676-1-bhe@redhat.com> References: <20210624052010.5676-1-bhe@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 cb89dbdedc46..2c5017db2621 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -623,7 +623,9 @@ 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: -- 2.17.2 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1lwHmo-00CmYo-7H for kexec@lists.infradead.org; Thu, 24 Jun 2021 05:20:24 +0000 From: Baoquan He Subject: [PATCH 1/2] docs: kernel-parameters: Update to reflect the current default size of atomic pool Date: Thu, 24 Jun 2021 13:20:09 +0800 Message-Id: <20210624052010.5676-2-bhe@redhat.com> In-Reply-To: <20210624052010.5676-1-bhe@redhat.com> References: <20210624052010.5676-1-bhe@redhat.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, x86@kernel.org, rientjes@google.com, rppt@linux.ibm.com, thomas.lendacky@amd.com, brijesh.singh@amd.com, kexec@lists.infradead.org, bhe@redhat.com 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 cb89dbdedc46..2c5017db2621 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -623,7 +623,9 @@ 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: -- 2.17.2 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec