Re: [PATCH v24 6/6] docs: kdump: Update the crashkernel description for arm64

Catalin Marinas
2022-05-07T18:23:09Z

On Sat, May 07, 2022 at 11:30:59AM +0800, Baoquan He wrote:
> On 05/07/22 at 09:41am, Leizhen (ThunderTown) wrote:
> > On 2022/5/7 7:14, Baoquan He wrote:
> > > On 05/06/22 at 07:44pm, Zhen Lei wrote:
> > >> Now arm64 has added support for "crashkernel=X,high" and
> > >> "crashkernel=Y,low". Unlike x86, crash low memory is not allocated if
> > >> "crashkernel=Y,low" is not specified.
> > >>
> > >> Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
> > >> ---
> > >> Documentation/admin-guide/kernel-parameters.txt | 9 +++++++--
> > >> 1 file changed, 7 insertions(+), 2 deletions(-)
> > >>
> > >> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> > >> index 3f1cc5e317ed4a5..aa44c61114aa4b8 100644
> > >> --- a/Documentation/admin-guide/kernel-parameters.txt
> > >> +++ b/Documentation/admin-guide/kernel-parameters.txt
> > >> @@ -808,7 +808,7 @@
> > >> 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
> > >> @@ -821,7 +821,7 @@
> > >> 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.
> > >> @@ -829,6 +829,11 @@
> > >> It will be ignored when crashkernel=X,high is not used
> > >> or memory reserved is below 4G.
> > >>
> > >> + [KNL, ARM64] range in low memory.
> > >> + This one let user to specify a low range in DMA zone for
> > > ^ not needed,
> > > Maybe Catalin can fix it when merging.
> >
> > Delete "This one let user to" or the entire sentence? I understand it to be the former.
>
> Oh, I mean the 'to' is not needed. "This one let user specify ....". The
> 'to' is a grammer mistake.

Slightly more correct is "This one lets the user specify..."

I can fix them up when applying.

--
Catalin