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

Baoquan He
2022-05-07T03:31:35Z

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.

>
> >
> > Other than this, LGTM,
> >
> > Acked-by: Baoquan He <bhe@redhat.com>
> >
> >> + crash dump kernel.
> >> + It will be ignored when crashkernel=X,high is not used.
> >> +
> >> cryptomgr.notests
> >> [KNL] Disable crypto self-tests
> >>
> >> --
> >> 2.25.1
> >>
> >
> > .
> >
>
> --
> Regards,
> Zhen Lei
>