Hi James, On 2/28/23 11:05, James Addison wrote: > There does appear to be a limit on the number of parameters accepted by the > kernel at boot-time, so this changeset updates the kernel-parameters.rst > documentation to reflect that. I looked at this again. It's not a limit on the number of kernel command line parameters AFAICT. It's a limit on the number of parameters that are passed to the init process. Basically any parameter that is not recognized as a kernel parameter OR anything that is after "--" on the kernel command line is put into an array of limited size for passing to the init process. > Signed-off-by: James Addison <jay@xxxxxxxxxxxxxx> > --- > Documentation/admin-guide/kernel-parameters.rst | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/Documentation/admin-guide/kernel-parameters.rst > b/Documentation/admin-guide/kernel-parameters.rst > index 19600c502..a3a099127 100644 > --- a/Documentation/admin-guide/kernel-parameters.rst > +++ b/Documentation/admin-guide/kernel-parameters.rst > @@ -203,7 +203,8 @@ be entered as an environment variable, whereas its > absence indicates that > it will appear as a kernel argument readable via /proc/cmdline by programs > running once the system is up. > > -The number of kernel parameters is not limited, but the length of the > +The number of kernel parameters is limited to 32 by default (128 in User Mode > +Linux), and is defined in ./init/main.c as MAX_INIT_ARGS. The length of the > complete command line (parameters including spaces etc.) is limited to > a fixed number of characters. This limit depends on the architecture > and is between 256 and 4096 characters. It is defined in the file > > base-commit: e492250d5252635b6c97d52eddf2792ec26f1ec1 -- ~Randy
