Commit a568375b authored by Bjorn Helgaas's avatar Bjorn Helgaas Committed by Jonathan Corbet

printk: Document that CONFIG_BOOT_PRINTK_DELAY required for boot_delay=

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: default avatarBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: default avatarRandy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20230126225420.1320276-1-helgaas@kernel.orgSigned-off-by: default avatarJonathan Corbet <corbet@lwn.net>
parent c1966bd1
...@@ -478,8 +478,10 @@ ...@@ -478,8 +478,10 @@
See Documentation/block/cmdline-partition.rst See Documentation/block/cmdline-partition.rst
boot_delay= Milliseconds to delay each printk during boot. boot_delay= Milliseconds to delay each printk during boot.
Values larger than 10 seconds (10000) are changed to Only works if CONFIG_BOOT_PRINTK_DELAY is enabled,
no delay (0). and you may also have to specify "lpj=". Boot_delay
values larger than 10 seconds (10000) are assumed
erroneous and ignored.
Format: integer Format: integer
bootconfig [KNL] bootconfig [KNL]
......
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