From: Bjorn Helgaas <helgaas@kernel.org>
To: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
Bjorn Helgaas <bhelgaas@google.com>
Subject: [PATCH] printk: Document that CONFIG_BOOT_PRINTK_DELAY required for boot_delay=
Date: Mon, 23 Jan 2023 12:04:40 -0600 [thread overview]
Message-ID: <20230123180440.901793-1-helgaas@kernel.org> (raw)
From: Bjorn Helgaas <bhelgaas@google.com>
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@google.com>
---
Documentation/admin-guide/kernel-parameters.txt | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 6cfa6e3996cf..b0b40b6a765c 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -480,8 +480,9 @@
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).
+ Enable CONFIG_BOOT_PRINTK_DELAY and also specify
+ "lpj=". Boot_delay values larger than 10 seconds
+ (10000) are changed to no delay (0).
Format: integer
bootconfig [KNL]
--
2.25.1
next reply other threads:[~2023-01-23 18:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-23 18:04 Bjorn Helgaas [this message]
2023-01-23 18:18 ` [PATCH] printk: Document that CONFIG_BOOT_PRINTK_DELAY required for boot_delay= Matthew Wilcox
2023-01-23 20:44 ` Bjorn Helgaas
2023-01-23 21:28 ` Randy Dunlap
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