[PATCH 3/3] kdump: update Documentation about crashkernel on arm64

Chen Zhou
2019-04-03T02:54:54Z

Now we support crashkernel=X,[high,low] on arm64, update the
Documentation.

Signed-off-by: Chen Zhou <chenzhou10@huawei.com>
---
Documentation/admin-guide/kernel-parameters.txt | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 27a5f8c..6772f4f 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -715,14 +715,14 @@
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
--
2.7.4