On Sat, 29 Jul 2023 08:41:46 -0700 "Paul E. McKenney" <paulmck@xxxxxxxxxx> wrote: > On Sat, Jul 29, 2023 at 11:23:46PM +0900, Masami Hiramatsu wrote: > > Hi Paul, > > > > On Thu, 27 Jul 2023 20:37:01 -0700 > > "Paul E. McKenney" <paulmck@xxxxxxxxxx> wrote: > > > > > In kernels built with CONFIG_BOOT_CONFIG_FORCE=y, /proc/cmdline will show > > > all kernel boot parameters, both those supplied by the boot loader and > > > those embedded in the kernel image. This works well for those who just > > > want to see all of the kernel boot parameters, but is not helpful to those > > > who need to see only those parameters that were embedded into the kernel > > > image. This is especially important in situations where there are many > > > kernel images for different kernel versions and kernel configurations, > > > all of which opens the door to a great deal of human error. > > > > There is /proc/bootconfig file which shows all bootconfig entries and is > > formatted as easily filter by grep (or any other line-based commands). > > (e.g. `grep ^kernel\\. /proc/cmdline` will filter all kernel cmdline > > parameters in the bootconfig) > > Could you clarify the reason why you need a dump of bootconfig file? > > Because I was unaware of /proc/bootconfig? ;-) Oh :) > > So how about if I replace this patch of mine with the following? Yes, I missed to update the proc.rst. Thanks! > > And thank you for pointing me at /proc/bootconfig. > > Thanx, Paul > > ------------------------------------------------------------------------ > > diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst > index 98c43c5ef1ee..832d66d4e396 100644 > --- a/Documentation/filesystems/proc.rst > +++ b/Documentation/filesystems/proc.rst > @@ -684,6 +684,7 @@ files are there, and which are missing. > File Content > ============ =============================================================== > apm Advanced power management info > + bootconfig Kernel command line obtained from boot config (5.5) > buddyinfo Kernel memory allocator information (see text) (2.5) > bus Directory containing bus specific information > cmdline Kernel command line, both from bootloader and embedded -- Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
