Messages in this thread | | | Subject | Re: [PATCH v2] init: Print out unknown kernel parameters | From | Randy Dunlap <> | Date | Wed, 12 May 2021 16:00:21 -0700 |
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On 5/11/21 2:10 PM, Andrew Halaney wrote: > It is easy to foobar setting a kernel parameter on the command line > without realizing it, there's not much output that you can use to > assess what the kernel did with that parameter by default. > > Make it a little more explicit which parameters on the command line > _looked_ like a valid parameter for the kernel, but did not match > anything and ultimately got tossed to init. This is very similar to the > unknown parameter message received when loading a module. > > This assumes the parameters are processed in a normal fashion, some > parameters (dyndbg= for example) don't register their > parameter with the rest of the kernel's parameters, and therefore > always show up in this list (and are also given to init - like the > rest of this list). > > Another example is BOOT_IMAGE= is highlighted as an offender, which it > technically is, but is passed by LILO and GRUB so most systems will see > that complaint. > > An example output where "foobared" and "unrecognized" are intentionally > invalid parameters: > > Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.12-dirty debug log_buf_len=4M foobared unrecognized=foo > Unknown command line parameters: foobared BOOT_IMAGE=/boot/vmlinuz-5.12-dirty unrecognized=foo
Hi Andrew, What order is the list of unknown command line parameters listed in?
> Suggested-by: Steven Rostedt <rostedt@goodmis.org> > Suggested-by: Borislav Petkov <bp@suse.de> > Signed-off-by: Andrew Halaney <ahalaney@redhat.com> > --- > > It's my first time sending a v2 via email, please let me know if I've > messed that up in anyway. I decided it wasn't worth the effort to do > "autocorrect" functionality Borislav was pondering about, feel free to > disagree on that if you have a strong opinion. > > v2: make output on a single line, make function static and __init, > include example output in commit message > > init/main.c | 42 ++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 42 insertions(+)
Thanks. -- ~Randy
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