On 1/26/23 14:54, Bjorn Helgaas wrote: > From: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> > > Document the fact that CONFIG_BOOT_PRINTK_DELAY must be enabled for the > "boot_delay" kernel parameter to work. Also mention that "lpj=" may be > necessary. > > Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> Reviewed-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> Thanks. > --- > Changes from v1 (https://lore.kernel.org/all/20230123180440.901793-1-helgaas@xxxxxxxxxx/): > - Clarify use of "lpj=". Reword consequences of delay larger than 10000. > > Documentation/admin-guide/kernel-parameters.txt | 6 ++++-- > 1 file changed, 4 insertions(+), 2 deletions(-) > > diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt > index 6cfa6e3996cf..814e58487239 100644 > --- a/Documentation/admin-guide/kernel-parameters.txt > +++ b/Documentation/admin-guide/kernel-parameters.txt > @@ -480,8 +480,10 @@ > See Documentation/block/cmdline-partition.rst > > boot_delay= Milliseconds to delay each printk during boot. > - Values larger than 10 seconds (10000) are changed to > - no delay (0). > + Only works if CONFIG_BOOT_PRINTK_DELAY is enabled, > + and you may also have to specify "lpj=". Boot_delay > + values larger than 10 seconds (10000) are assumed > + erroneous and ignored. > Format: integer > > bootconfig [KNL] -- ~Randy
