From: Randy Dunlap <rdunlap@infradead.org>
To: Chen Zhou <chenzhou10@huawei.com>,
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
Subject: Re: [PATCH v14 11/11] kdump: update Documentation about crashkernel
Date: Sat, 30 Jan 2021 09:53:31 -0800 [thread overview]
Message-ID: <686c331c-8009-1203-e8fe-b1ae67ae9652@infradead.org> (raw)
In-Reply-To: <20210130071025.65258-12-chenzhou10@huawei.com>
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
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next prev parent reply other threads:[~2021-01-30 17:55 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-30 7:10 [PATCH v14 00/11] support reserving crashkernel above 4G on arm64 kdump Chen Zhou
2021-01-30 7:10 ` [PATCH v14 01/11] x86: kdump: replace the hard-coded alignment with macro CRASH_ALIGN Chen Zhou
2021-02-18 3:29 ` Baoquan He
2021-02-24 14:19 ` Catalin Marinas
2021-02-25 7:25 ` Baoquan He
2021-02-26 6:45 ` chenzhou
2021-02-26 15:38 ` Eric W. Biederman
2021-03-02 7:43 ` Baoquan He
2021-03-29 2:34 ` chenzhou
2021-01-30 7:10 ` [PATCH v14 02/11] x86: kdump: make the lower bound of crash kernel reservation consistent Chen Zhou
2021-02-18 3:33 ` Baoquan He
2021-02-24 14:35 ` Catalin Marinas
2021-02-25 7:08 ` Baoquan He
2021-02-25 14:42 ` Catalin Marinas
2021-02-25 15:44 ` Baoquan He
2021-02-26 7:32 ` chenzhou
2021-01-30 7:10 ` [PATCH v14 03/11] x86: kdump: use macro CRASH_ADDR_LOW_MAX in functions reserve_crashkernel() Chen Zhou
2021-02-18 8:23 ` Baoquan He
2021-01-30 7:10 ` [PATCH v14 04/11] x86: kdump: move xen_pv_domain() check and insert_resource() to setup_arch() Chen Zhou
2021-02-18 4:14 ` Baoquan He
2021-01-30 7:10 ` [PATCH v14 05/11] x86: kdump: move reserve_crashkernel[_low]() into crash_core.c Chen Zhou
2021-01-30 7:10 ` [PATCH v14 06/11] x86/elf: Move vmcore_elf_check_arch_cross to arch/x86/include/asm/elf.h Chen Zhou
2021-02-18 6:31 ` Baoquan He
2021-02-18 7:05 ` chenzhou
2021-01-30 7:10 ` [PATCH v14 07/11] arm64: kdump: introduce some macroes for crash kernel reservation Chen Zhou
2021-02-04 16:20 ` Nicolas Saenz Julienne
2021-02-04 16:27 ` Nicolas Saenz Julienne
2021-01-30 7:10 ` [PATCH v14 08/11] arm64: kdump: reimplement crashkernel=X Chen Zhou
2021-02-24 16:04 ` Catalin Marinas
2021-02-26 10:31 ` chenzhou
2021-02-26 10:43 ` chenzhou
2021-01-30 7:10 ` [PATCH v14 09/11] x86, arm64: Add ARCH_WANT_RESERVE_CRASH_KERNEL config Chen Zhou
2021-02-18 7:31 ` Baoquan He
2021-02-18 7:40 ` Baoquan He
2021-02-18 8:35 ` Baoquan He
2021-02-20 3:22 ` chenzhou
2021-01-30 7:10 ` [PATCH v14 10/11] arm64: kdump: add memory for devices by DT property linux, usable-memory-range Chen Zhou
2021-01-30 7:10 ` [PATCH v14 11/11] kdump: update Documentation about crashkernel Chen Zhou
2021-01-30 17:53 ` Randy Dunlap [this message]
2021-02-04 1:53 ` chenzhou
2021-02-18 8:40 ` Baoquan He
2021-02-20 3:25 ` chenzhou
2021-02-08 6:46 ` [PATCH v14 00/11] support reserving crashkernel above 4G on arm64 kdump chenzhou
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