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> --- 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] -- 2.25.1
