On 02/20/25 at 05:54pm, Jiri Bohac wrote:
......
> diff --git a/Documentation/admin-guide/kernel-parameters.txt 
> b/Documentation/admin-guide/kernel-parameters.txt
> index fb8752b42ec8..ea4d53435515 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -987,6 +987,20 @@
>                       0: to disable low allocation.
>                       It will be ignored when crashkernel=X,high is not used
>                       or memory reserved is below 4G.
> +     crashkernel=size[KMG],cma
> +                     [KNL, X86] Reserve additional crash kernel memory from 
> CMA.
> +                     This reservation is usable by the first system's 
> userspace,
> +                     so this should not be used if dumping of userspace
> +                     memory is intended. A standard crashkernel reservation,
> +                     as described above, is still needed to hold the crash
> +                     kernel and initrd.
> +                     This option increases the risk of a kdump failure: DMA
> +                     transfers configured by the first kernel may end up
> +                     corrupting the second kernel's memory. This reservation
> +                     method is intended for systems that can't afford to
> +                     sacrifice enough memory for standard crashkernel
> +                     reservation and where less reliable kdump is 
> preferrable 
There's trailing whitespace at the end of above line, checkpatch should
be run to check it.

> +                     to no kdump at all.
>  
>       cryptomgr.notests
>                       [KNL] Disable crypto self-tests
> 
> -- 
> Jiri Bohac <jbo...@suse.cz>
> SUSE Labs, Prague, Czechia
> 


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