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=-12.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable 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 A7AABC433E9 for ; Sat, 30 Jan 2021 17:54:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 710E364E19 for ; Sat, 30 Jan 2021 17:54:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232010AbhA3Ryd (ORCPT ); Sat, 30 Jan 2021 12:54:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53298 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230045AbhA3Ry3 (ORCPT ); Sat, 30 Jan 2021 12:54:29 -0500 Received: from merlin.infradead.org (merlin.infradead.org [IPv6:2001:8b0:10b:1231::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AC3C4C061573; Sat, 30 Jan 2021 09:53:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=Content-Transfer-Encoding:Content-Type: In-Reply-To:MIME-Version:Date:Message-ID:From:References:Cc:To:Subject:Sender :Reply-To:Content-ID:Content-Description; bh=r968U5unr3V3GLWy0PdpbYarRwMGU/lEp6681LekGd8=; b=Laiab9D0nWGgpVEOZaJ07BdBOB P0zzHUwe1Fzmr26PFV46BlktFmhy07H6v+4qQFuXu2hM+n//TzHqX85I5SWTFKfxh/6o/UbZMQ1OA ST33rSISF7qCkgHZURNjZh4f7WT3reO/F7o6wQejhmEPf4g27nPqj6K3E+gw89TPotrZ43NmBO6/M Ix+qlJbUc/PWBUxG3ajoPp5CTbyULRgEaoCnZcFLvUGmwMV0k/t5sgSeeGrY0mb/IDRp0cY16HtJk 0pj6lxnNV9Le/eZptOpHJsjh4zlfL3jzlB6ypv4r/JUlUFhNRWzyYQYxACmx393XyKIA/8BWRNxDA rpt3EBiQ==; Received: from [2601:1c0:6280:3f0::7650] by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1l5uRJ-0007Wc-Sy; Sat, 30 Jan 2021 17:53:42 +0000 Subject: Re: [PATCH v14 11/11] kdump: update Documentation about crashkernel To: Chen Zhou , mingo@redhat.com, tglx@linutronix.de, rppt@kernel.org, dyoung@redhat.com, bhe@redhat.com, catalin.marinas@arm.com, will@kernel.org, nsaenzjulienne@suse.de, corbet@lwn.net, John.P.donnelly@oracle.com, bhsharma@redhat.com, prabhakar.pkin@gmail.com Cc: horms@verge.net.au, robh+dt@kernel.org, arnd@arndb.de, james.morse@arm.com, xiexiuqi@huawei.com, guohanjun@huawei.com, huawei.libin@huawei.com, wangkefeng.wang@huawei.com, linux-doc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kexec@lists.infradead.org References: <20210130071025.65258-1-chenzhou10@huawei.com> <20210130071025.65258-12-chenzhou10@huawei.com> From: Randy Dunlap Message-ID: <686c331c-8009-1203-e8fe-b1ae67ae9652@infradead.org> Date: Sat, 30 Jan 2021 09:53:31 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.4.0 MIME-Version: 1.0 In-Reply-To: <20210130071025.65258-12-chenzhou10@huawei.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi-- On 1/29/21 11:10 PM, Chen Zhou wrote: > --- > Documentation/admin-guide/kdump/kdump.rst | 22 ++++++++++++++++--- > .../admin-guide/kernel-parameters.txt | 11 ++++++++-- > 2 files changed, 28 insertions(+), 5 deletions(-) > > diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt > index a10b545c2070..908e5c8b61ba 100644 > --- a/Documentation/admin-guide/kernel-parameters.txt > +++ b/Documentation/admin-guide/kernel-parameters.txt All of the "arm64" instances in [square brackets] should be "ARM64". > @@ -738,6 +738,9 @@ > [KNL, X86-64] Select a region under 4G first, and > fall back to reserve region above 4G when '@offset' > hasn't been specified. > + [KNL, arm64] Try low allocation in DMA zone and fall back here > + to high allocation if it fails when '@offset' hasn't been > + specified. > See Documentation/admin-guide/kdump/kdump.rst for further details. > > crashkernel=range1:size1[,range2:size2,...][@offset] > @@ -754,6 +757,8 @@ > Otherwise memory region will be allocated below 4G, if > available. > It will be ignored if crashkernel=X is specified. > + [KNL, arm64] range in high memory. here > + Allow kernel to allocate physical memory region from top. > crashkernel=size[KMG],low > [KNL, X86-64] range under 4G. When crashkernel=X,high > is passed, kernel could allocate physical memory region > @@ -762,13 +767,15 @@ > requires at least 64M+32K low memory, also enough extra > low memory is needed to make sure DMA buffers for 32-bit > devices won't run out. Kernel would try to allocate at > - at least 256M below 4G automatically. > + least 256M below 4G automatically. > This one let user to specify own low range under 4G > for second kernel instead. > 0: to disable low allocation. > It will be ignored when crashkernel=X,high is not used > or memory reserved is below 4G. > - > + [KNL, arm64] range in low memory. here > + This one let user to specify a low range in DMA zone for > + crash dump kernel. Thanks. -- ~Randy 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=-10.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=unavailable 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 761ACC433DB for ; Sat, 30 Jan 2021 17:55:16 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2D1F764DF5 for ; Sat, 30 Jan 2021 17:55:16 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2D1F764DF5 Authentication-Results: mail.kernel.org; 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Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l5uRR-0007XG-4P; Sat, 30 Jan 2021 17:53:49 +0000 Received: from [2601:1c0:6280:3f0::7650] by merlin.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1l5uRJ-0007Wc-Sy; Sat, 30 Jan 2021 17:53:42 +0000 Subject: Re: [PATCH v14 11/11] kdump: update Documentation about crashkernel To: Chen Zhou , mingo@redhat.com, tglx@linutronix.de, rppt@kernel.org, dyoung@redhat.com, bhe@redhat.com, catalin.marinas@arm.com, will@kernel.org, nsaenzjulienne@suse.de, corbet@lwn.net, John.P.donnelly@oracle.com, bhsharma@redhat.com, prabhakar.pkin@gmail.com References: <20210130071025.65258-1-chenzhou10@huawei.com> <20210130071025.65258-12-chenzhou10@huawei.com> From: Randy Dunlap Message-ID: <686c331c-8009-1203-e8fe-b1ae67ae9652@infradead.org> Date: Sat, 30 Jan 2021 09:53:31 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.4.0 MIME-Version: 1.0 In-Reply-To: <20210130071025.65258-12-chenzhou10@huawei.com> Content-Language: en-US X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: wangkefeng.wang@huawei.com, arnd@arndb.de, xiexiuqi@huawei.com, linux-doc@vger.kernel.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, robh+dt@kernel.org, horms@verge.net.au, james.morse@arm.com, huawei.libin@huawei.com, guohanjun@huawei.com, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi-- On 1/29/21 11:10 PM, Chen Zhou wrote: > --- > Documentation/admin-guide/kdump/kdump.rst | 22 ++++++++++++++++--- > .../admin-guide/kernel-parameters.txt | 11 ++++++++-- > 2 files changed, 28 insertions(+), 5 deletions(-) > > diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt > index a10b545c2070..908e5c8b61ba 100644 > --- a/Documentation/admin-guide/kernel-parameters.txt > +++ b/Documentation/admin-guide/kernel-parameters.txt All of the "arm64" instances in [square brackets] should be "ARM64". > @@ -738,6 +738,9 @@ > [KNL, X86-64] Select a region under 4G first, and > fall back to reserve region above 4G when '@offset' > hasn't been specified. > + [KNL, arm64] Try low allocation in DMA zone and fall back here > + to high allocation if it fails when '@offset' hasn't been > + specified. > See Documentation/admin-guide/kdump/kdump.rst for further details. > > crashkernel=range1:size1[,range2:size2,...][@offset] > @@ -754,6 +757,8 @@ > Otherwise memory region will be allocated below 4G, if > available. > It will be ignored if crashkernel=X is specified. > + [KNL, arm64] range in high memory. here > + Allow kernel to allocate physical memory region from top. > crashkernel=size[KMG],low > [KNL, X86-64] range under 4G. When crashkernel=X,high > is passed, kernel could allocate physical memory region > @@ -762,13 +767,15 @@ > requires at least 64M+32K low memory, also enough extra > low memory is needed to make sure DMA buffers for 32-bit > devices won't run out. Kernel would try to allocate at > - at least 256M below 4G automatically. > + least 256M below 4G automatically. > This one let user to specify own low range under 4G > for second kernel instead. > 0: to disable low allocation. > It will be ignored when crashkernel=X,high is not used > or memory reserved is below 4G. > - > + [KNL, arm64] range in low memory. here > + This one let user to specify a low range in DMA zone for > + crash dump kernel. Thanks. -- ~Randy _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Subject: Re: [PATCH v14 11/11] kdump: update Documentation about crashkernel References: <20210130071025.65258-1-chenzhou10@huawei.com> <20210130071025.65258-12-chenzhou10@huawei.com> From: Randy Dunlap Message-ID: <686c331c-8009-1203-e8fe-b1ae67ae9652@infradead.org> Date: Sat, 30 Jan 2021 09:53:31 -0800 MIME-Version: 1.0 In-Reply-To: <20210130071025.65258-12-chenzhou10@huawei.com> Content-Language: en-US List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: Chen Zhou , mingo@redhat.com, tglx@linutronix.de, rppt@kernel.org, dyoung@redhat.com, bhe@redhat.com, catalin.marinas@arm.com, will@kernel.org, nsaenzjulienne@suse.de, corbet@lwn.net, John.P.donnelly@oracle.com, bhsharma@redhat.com, prabhakar.pkin@gmail.com Cc: wangkefeng.wang@huawei.com, arnd@arndb.de, xiexiuqi@huawei.com, linux-doc@vger.kernel.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, robh+dt@kernel.org, horms@verge.net.au, james.morse@arm.com, huawei.libin@huawei.com, guohanjun@huawei.com, linux-arm-kernel@lists.infradead.org Hi-- On 1/29/21 11:10 PM, Chen Zhou wrote: > --- > Documentation/admin-guide/kdump/kdump.rst | 22 ++++++++++++++++--- > .../admin-guide/kernel-parameters.txt | 11 ++++++++-- > 2 files changed, 28 insertions(+), 5 deletions(-) > > diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt > index a10b545c2070..908e5c8b61ba 100644 > --- a/Documentation/admin-guide/kernel-parameters.txt > +++ b/Documentation/admin-guide/kernel-parameters.txt All of the "arm64" instances in [square brackets] should be "ARM64". > @@ -738,6 +738,9 @@ > [KNL, X86-64] Select a region under 4G first, and > fall back to reserve region above 4G when '@offset' > hasn't been specified. > + [KNL, arm64] Try low allocation in DMA zone and fall back here > + to high allocation if it fails when '@offset' hasn't been > + specified. > See Documentation/admin-guide/kdump/kdump.rst for further details. > > crashkernel=range1:size1[,range2:size2,...][@offset] > @@ -754,6 +757,8 @@ > Otherwise memory region will be allocated below 4G, if > available. > It will be ignored if crashkernel=X is specified. > + [KNL, arm64] range in high memory. here > + Allow kernel to allocate physical memory region from top. > crashkernel=size[KMG],low > [KNL, X86-64] range under 4G. When crashkernel=X,high > is passed, kernel could allocate physical memory region > @@ -762,13 +767,15 @@ > requires at least 64M+32K low memory, also enough extra > low memory is needed to make sure DMA buffers for 32-bit > devices won't run out. Kernel would try to allocate at > - at least 256M below 4G automatically. > + least 256M below 4G automatically. > This one let user to specify own low range under 4G > for second kernel instead. > 0: to disable low allocation. > It will be ignored when crashkernel=X,high is not used > or memory reserved is below 4G. > - > + [KNL, arm64] range in low memory. here > + This one let user to specify a low range in DMA zone for > + crash dump kernel. Thanks. -- ~Randy _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec