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

[Baoquan He]

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 at 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 at 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
>