Messages in this thread | | | Date | Thu, 27 Jul 2023 20:35:10 -0700 | From | "Paul E. McKenney" <> | Subject | [PATCH RFC bootconfig 0/2] Distinguish bootloader and embedded kernel parameters |
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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
------------------------------------------------------------------------
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(-)
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