* [PATCH v2] printk: Document that CONFIG_BOOT_PRINTK_DELAY required for boot_delay=
@ 2023-01-26 22:54 Bjorn Helgaas
2023-01-27 1:12 ` Randy Dunlap
2023-02-02 18:31 ` Jonathan Corbet
0 siblings, 2 replies; 3+ messages in thread
From: Bjorn Helgaas @ 2023-01-26 22:54 UTC (permalink / raw)
To: Jonathan Corbet
Cc: Matthew Wilcox, Randy Dunlap, linux-doc, linux-kernel, Bjorn Helgaas
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>
---
Changes from v1 (https://lore.kernel.org/all/20230123180440.901793-1-helgaas@kernel.org/):
- 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
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH v2] printk: Document that CONFIG_BOOT_PRINTK_DELAY required for boot_delay=
2023-01-26 22:54 [PATCH v2] printk: Document that CONFIG_BOOT_PRINTK_DELAY required for boot_delay= Bjorn Helgaas
@ 2023-01-27 1:12 ` Randy Dunlap
2023-02-02 18:31 ` Jonathan Corbet
1 sibling, 0 replies; 3+ messages in thread
From: Randy Dunlap @ 2023-01-27 1:12 UTC (permalink / raw)
To: Bjorn Helgaas, Jonathan Corbet
Cc: Matthew Wilcox, linux-doc, linux-kernel, Bjorn Helgaas
On 1/26/23 14:54, Bjorn Helgaas wrote:
> 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>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Thanks.
> ---
> Changes from v1 (https://lore.kernel.org/all/20230123180440.901793-1-helgaas@kernel.org/):
> - 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
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v2] printk: Document that CONFIG_BOOT_PRINTK_DELAY required for boot_delay=
2023-01-26 22:54 [PATCH v2] printk: Document that CONFIG_BOOT_PRINTK_DELAY required for boot_delay= Bjorn Helgaas
2023-01-27 1:12 ` Randy Dunlap
@ 2023-02-02 18:31 ` Jonathan Corbet
1 sibling, 0 replies; 3+ messages in thread
From: Jonathan Corbet @ 2023-02-02 18:31 UTC (permalink / raw)
To: Bjorn Helgaas
Cc: Matthew Wilcox, Randy Dunlap, linux-doc, linux-kernel, Bjorn Helgaas
Bjorn Helgaas <helgaas@kernel.org> writes:
> 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>
> ---
> Changes from v1 (https://lore.kernel.org/all/20230123180440.901793-1-helgaas@kernel.org/):
> - 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
Applied, thanks.
jon
^ permalink raw reply [flat|nested] 3+ messages in thread
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