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SubjectRe: [PATCH] init: Make unknown command line param message clearer
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On 10/13/21 3:35 PM, Andrew Halaney wrote:
> The prior message is confusing users, which is the exact opposite of the
> goal. If the message is being seen, one of the following situations is
> happening:
>
> 1. the param is misspelled
> 2. the param is not valid due to the kernel configuration
> 3. the param is intended for init but isn't after the '--'
> delineator on the command line
>
> To make that more clear to the user, explicitly mention "kernel command
> line" and also note that the params are still passed to user space to
> avoid causing any alarm over params intended for init.
>
> Fixes: 86d1919a4fb0 ("init: print out unknown kernel parameters")
> Suggested-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
> Signed-off-by: Andrew Halaney <ahalaney@redhat.com>
> ---
>
> Here's v2 of this. I had to change the code a bit from what Steven
> recommended to compile/look proper, but the intended format he had
> suggested is still the same.
>
> v1 -> v2:
> * Print a much more concise message
>
> v1: https://lore.kernel.org/all/20211012213523.39801-1-ahalaney@redhat.com/
>
> Thanks,
> Andrew
>
> init/main.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/init/main.c b/init/main.c
> index ee4d3e1b3eb9..a286995449e2 100644
> --- a/init/main.c
> +++ b/init/main.c
> @@ -925,7 +925,9 @@ static void __init print_unknown_bootoptions(void)
> for (p = &envp_init[2]; *p; p++)
> end += sprintf(end, " %s", *p);
>
> - pr_notice("Unknown command line parameters:%s\n", unknown_options);
> + /* Start at unknown_options[1] to skip the initial space */
> + pr_notice("Unknown kernel command line parameters \"%s\", will be passed to user space.\n",
> + &unknown_options[1]);
> memblock_free(unknown_options, len);
> }
>
>

LGTM. Thanks.

Acked-by: Randy Dunlap <rdunlap@infradead.org>

--
~Randy

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