* [RFC] [PATCH] Kconfig: enlarge printk buffer size limit
@ 2007-03-02 13:27 Artem Bityutskiy
2007-03-02 17:11 ` Randy Dunlap
0 siblings, 1 reply; 3+ messages in thread
From: Artem Bityutskiy @ 2007-03-02 13:27 UTC (permalink / raw)
To: linux-kernel
From: Artem Bityutskiy <artem.bityutskiy@nokia.com>
Subject: [RFC] [PATCH] Kconfig: enlarge printk buffer size limit
This patch makes the upper kernel ring buffer size limit larger. It
is often very handy to have huge ring-buffer for debugging purposes,
when the subsystem which is being debugged produces large amount of
useful output.
Index: ubi-2.6.git/lib/Kconfig.debug
===================================================================
--- ubi-2.6.git.orig/lib/Kconfig.debug
+++ ubi-2.6.git/lib/Kconfig.debug
@@ -79,7 +79,7 @@ config DEBUG_KERNEL
config LOG_BUF_SHIFT
int "Kernel log buffer size (16 => 64KB, 17 => 128KB)" if DEBUG_KERNEL
- range 12 21
+ range 12 26
default 17 if S390 || LOCKDEP
default 16 if X86_NUMAQ || IA64
default 15 if SMP
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [RFC] [PATCH] Kconfig: enlarge printk buffer size limit
2007-03-02 13:27 [RFC] [PATCH] Kconfig: enlarge printk buffer size limit Artem Bityutskiy
@ 2007-03-02 17:11 ` Randy Dunlap
2007-03-07 11:33 ` Artem Bityutskiy
0 siblings, 1 reply; 3+ messages in thread
From: Randy Dunlap @ 2007-03-02 17:11 UTC (permalink / raw)
To: dedekind; +Cc: linux-kernel
On Fri, 02 Mar 2007 15:27:48 +0200 Artem Bityutskiy wrote:
> From: Artem Bityutskiy <artem.bityutskiy@nokia.com>
> Subject: [RFC] [PATCH] Kconfig: enlarge printk buffer size limit
>
> This patch makes the upper kernel ring buffer size limit larger. It
> is often very handy to have huge ring-buffer for debugging purposes,
> when the subsystem which is being debugged produces large amount of
> useful output.
>
> Index: ubi-2.6.git/lib/Kconfig.debug
> ===================================================================
> --- ubi-2.6.git.orig/lib/Kconfig.debug
> +++ ubi-2.6.git/lib/Kconfig.debug
> @@ -79,7 +79,7 @@ config DEBUG_KERNEL
>
> config LOG_BUF_SHIFT
> int "Kernel log buffer size (16 => 64KB, 17 => 128KB)" if DEBUG_KERNEL
> - range 12 21
> + range 12 26
> default 17 if S390 || LOCKDEP
> default 16 if X86_NUMAQ || IA64
> default 15 if SMP
That's simple enough, but you could also just add
log_buf_len=huge_number
or
log_buf_len=500M
or
log_buf_len=1G
(for megabytes or gigabytes) to the kernel boot command line.
---
~Randy
*** Remember to use Documentation/SubmitChecklist when testing your code ***
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2007-03-02 13:27 [RFC] [PATCH] Kconfig: enlarge printk buffer size limit Artem Bityutskiy
2007-03-02 17:11 ` Randy Dunlap
2007-03-07 11:33 ` Artem Bityutskiy
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