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From: Zhen Lei <thunder.leizhen@huawei.com>
To: Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	<x86@kernel.org>, "H . Peter Anvin" <hpa@zytor.com>,
	<linux-kernel@vger.kernel.org>, Dave Young <dyoung@redhat.com>,
	Baoquan He <bhe@redhat.com>, Vivek Goyal <vgoyal@redhat.com>,
	Eric Biederman <ebiederm@xmission.com>,
	<kexec@lists.infradead.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	"Will Deacon" <will@kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	Rob Herring <robh+dt@kernel.org>,
	Frank Rowand <frowand.list@gmail.com>,
	<devicetree@vger.kernel.org>, Jonathan Corbet <corbet@lwn.net>,
	<linux-doc@vger.kernel.org>
Cc: Zhen Lei <thunder.leizhen@huawei.com>,
	Randy Dunlap <rdunlap@infradead.org>,
	Feng Zhou <zhoufeng.zf@bytedance.com>,
	Kefeng Wang <wangkefeng.wang@huawei.com>,
	Chen Zhou <dingguo.cz@antgroup.com>,
	"John Donnelly" <John.p.donnelly@oracle.com>,
	Dave Kleikamp <dave.kleikamp@oracle.com>
Subject: [PATCH v22 9/9] docs: kdump: Update the crashkernel description for arm64
Date: Thu, 14 Apr 2022 19:57:20 +0800	[thread overview]
Message-ID: <20220414115720.1887-10-thunder.leizhen@huawei.com> (raw)
In-Reply-To: <20220414115720.1887-1-thunder.leizhen@huawei.com>

Now arm64 has added support for "crashkernel=X,high" and
"crashkernel=Y,low", and implements "crashkernel=X[@offset]" in the
same way as x86. So update the Documentation.

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Acked-by: Baoquan He <bhe@redhat.com>
---
 Documentation/admin-guide/kernel-parameters.txt | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 3f1cc5e317ed4a5..ae0aa63ffe82f59 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -795,7 +795,7 @@
 			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/admin-guide/kdump/kdump.rst for further details.
@@ -808,20 +808,20 @@
 			Documentation/admin-guide/kdump/kdump.rst 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
 			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
+			devices won't run out. Kernel would try to allocate
 			at least 256M below 4G automatically.
 			This one let user to specify own low range under 4G
 			for second kernel instead.
-- 
2.25.1


  parent reply	other threads:[~2022-04-14 11:59 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-14 11:57 [PATCH v22 0/9] support reserving crashkernel above 4G on arm64 kdump Zhen Lei
2022-04-14 11:57 ` [PATCH v22 1/9] kdump: return -ENOENT if required cmdline option does not exist Zhen Lei
2022-04-25  3:49   ` Baoquan He
2022-04-14 11:57 ` [PATCH v22 2/9] arm64: Use insert_resource() to simplify code Zhen Lei
2022-04-14 11:57 ` [PATCH v22 3/9] arm64: kdump: Remove some redundant checks in map_mem() Zhen Lei
2022-04-14 11:57 ` [PATCH v22 4/9] arm64: kdump: Don't force page-level mappings for memory above 4G Zhen Lei
2022-04-26 14:26   ` Catalin Marinas
2022-04-27  7:12     ` Leizhen (ThunderTown)
2022-04-14 11:57 ` [PATCH v22 5/9] arm64: kdump: Reimplement crashkernel=X Zhen Lei
2022-04-26 18:02   ` Catalin Marinas
2022-04-27  6:54     ` Leizhen (ThunderTown)
2022-04-27 12:32       ` Catalin Marinas
2022-04-27 13:49         ` Leizhen (ThunderTown)
2022-04-27 16:04           ` Catalin Marinas
2022-04-28  2:22             ` Leizhen (ThunderTown)
2022-04-28  3:40             ` Baoquan He
2022-04-28  3:52               ` Baoquan He
2022-04-28  9:33                 ` Leizhen (ThunderTown)
2022-04-29  3:24                   ` Baoquan He
2022-04-29  8:02                     ` Leizhen (ThunderTown)
2022-04-29  8:25                       ` Leizhen (ThunderTown)
2022-05-03 22:00                         ` Catalin Marinas
2022-05-05  2:13                           ` Leizhen (ThunderTown)
2022-05-05  3:00                           ` Baoquan He
2022-05-05 14:20                             ` Catalin Marinas
2022-05-06 11:39                               ` Baoquan He
2022-04-14 11:57 ` [PATCH v22 6/9] arm64: kdump: Use page-level mapping for the high memory of crashkernel Zhen Lei
2022-04-14 11:57 ` [PATCH v22 7/9] arm64: kdump: Try not to use NO_BLOCK_MAPPINGS for memory under 4G Zhen Lei
2022-04-14 11:57 ` [PATCH v22 8/9] of: fdt: Add memory for devices by DT property "linux,usable-memory-range" Zhen Lei
2022-04-14 11:57 ` Zhen Lei [this message]
2022-04-19 17:02 ` [PATCH v22 0/9] support reserving crashkernel above 4G on arm64 kdump Dave Kleikamp
2022-04-25  2:19 ` Leizhen (ThunderTown)
2022-04-25  2:45   ` Baoquan He
2022-04-25  6:29     ` Leizhen (ThunderTown)

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