From patchwork Tue May 7 03:50:58 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: chenzhou X-Patchwork-Id: 10932203 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BCC79912 for ; Tue, 7 May 2019 03:42:54 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A9371228C8 for ; Tue, 7 May 2019 03:42:54 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9CFEB288F7; Tue, 7 May 2019 03:42:54 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 46756288F6 for ; Tue, 7 May 2019 03:42:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=rX0IthW46IuETinsAnnMGW6Nfz+8XkxGEsXEicbHK1M=; b=AVnZJoYh3/MfLF /F5kXD4C3r9Z5l1D7ljQyTNjuXyMuTmePgmTO5lCXn9jpLfcAuZpyCQb+losV7p0SrjWd2XK6jpKI P8k2fhcW2yn4eo/MDVu5oIaIAWFEsj3b/AH5kX4cXKMIhDlFPr1C5roTMoD5MYVAsH0vFjJxjrjQo hpaWGQDCGbWBuEc3NtDlqVNAVQ10mwjTwNBJieolqaPV/jEm0k/+eB3FxStSL+zk+zQj1oKD8IeMh X6hacF7UuGRLLOO+GwsxaMYtv5HxfAYz8Yz+MSvOwCMmYCJ7qspXq4cSJ46v/KPkq/cFn2CDmZakM YLKtL9mEX6RFVZ1stznQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hNr0D-0002hj-OU; Tue, 07 May 2019 03:42:49 +0000 Received: from szxga04-in.huawei.com ([45.249.212.190] helo=huawei.com) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hNqzi-00025b-4y; Tue, 07 May 2019 03:42:20 +0000 Received: from DGGEMS403-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id 74D60BC3975760A175A1; Tue, 7 May 2019 11:42:15 +0800 (CST) Received: from localhost.localdomain.localdomain (10.175.113.25) by DGGEMS403-HUB.china.huawei.com (10.3.19.203) with Microsoft SMTP Server id 14.3.439.0; Tue, 7 May 2019 11:42:07 +0800 From: Chen Zhou To: , , , , , , , , Subject: [PATCH 4/4] kdump: update Documentation about crashkernel on arm64 Date: Tue, 7 May 2019 11:50:58 +0800 Message-ID: <20190507035058.63992-5-chenzhou10@huawei.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190507035058.63992-1-chenzhou10@huawei.com> References: <20190507035058.63992-1-chenzhou10@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.113.25] X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190506_204218_411627_FE378FEF X-CRM114-Status: UNSURE ( 9.67 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: wangkefeng.wang@huawei.com, linux-mm@kvack.org, Chen Zhou , kexec@lists.infradead.org, linux-kernel@vger.kernel.org, takahiro.akashi@linaro.org, horms@verge.net.au, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Now we support crashkernel=X,[high,low] on arm64, update the Documentation. Signed-off-by: Chen Zhou --- Documentation/admin-guide/kernel-parameters.txt | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 268b10a..03a08aa 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -705,7 +705,7 @@ memory region [offset, offset + size] for that kernel image. If '@offset' is omitted, then a suitable offset is selected automatically. - [KNL, x86_64] select a region under 4G first, and + [KNL, x86_64, arm64] select a region under 4G first, and fall back to reserve region above 4G when '@offset' hasn't been specified. See Documentation/kdump/kdump.txt for further details. @@ -718,14 +718,14 @@ Documentation/kdump/kdump.txt for an example. crashkernel=size[KMG],high - [KNL, x86_64] range could be above 4G. Allow kernel + [KNL, x86_64, arm64] range could be above 4G. Allow kernel to allocate physical memory region from top, so could be above 4G if system have more than 4G ram installed. Otherwise memory region will be allocated below 4G, if available. It will be ignored if crashkernel=X is specified. crashkernel=size[KMG],low - [KNL, x86_64] range under 4G. When crashkernel=X,high + [KNL, x86_64, arm64] range under 4G. When crashkernel=X,high is passed, kernel could allocate physical memory region above 4G, that cause second kernel crash on system that require some amount of low memory, e.g. swiotlb