Re: [PATCH RFC bootconfig 0/2] Distinguish bootloader and embedded kernel parameters

Randy Dunlap
2023-07-28T04:25:22Z

On 7/27/23 20:35, Paul E. McKenney wrote:
> Hello!
>
> This series provides /proc interfaces parallel to /proc/cmdline that
> provide only those kernel boot parameters that were provided by the
> bootloader (/proc/cmdline_load) and only those parameters that were
> embedded in the kernel image (/proc/cmdline_image, in boot-config format).
> This is especially important when these parameters are presented to the
> boot loader by automation that might gather them from diverse sources,
> and also when a kexec-based reboot process pulls the kernel boot
> parameters from /proc. If such a reboot process uses /proc/cmdline,
> the kernel parameters from the image are replicated on every reboot,
> which can be frustrating when the new kernel has different embedded
> kernel boot parameters.
>
> Why put these in /proc? Because they is quite similar to /proc/cmdline,
> so it makes sense to put it in the same place that /proc/cmdline is
> located.
>
> 1. fs/proc: Add /proc/cmdline_load for boot loader arguments.
>
> 2. fs/proc: Add /proc/cmdline_image for embedded arguments.
>
> Thanx, Paul
>

Hi Paul,

This series seems to be missing updates to
Documentation/filesystems/proc.rst.

Please add them.
Thanks.

> ------------------------------------------------------------------------
>
> b/fs/proc/cmdline.c | 13 +++++++++++++
> b/include/linux/init.h | 3 ++-
> b/init/main.c | 2 +-
> fs/proc/cmdline.c | 12 ++++++++++++
> include/linux/init.h | 11 ++++++-----
> init/main.c | 9 +++++++++
> 6 files changed, 43 insertions(+), 7 deletions(-)

--
~Randy