Hello all,
For the efficient and speedy troubleshooting, I'd like to propose adding
extra information to the output of printk automatically. Extra information
includes the file name and the line number that called printk.
This feature is accomplished by only adding some macros to log-level
definition in header file.
I believe this feature would be helpful for you as well, so I'd like to get
feedback about my feature and implementation from you before I post this post
to LKML.
Pros;
- No modification to existing files of kernel except few lines of kernel.h.
- You can activate this feature at kernel building using -D.
Cons;
- Messages without loglevel can't be benefited directly by this feature.
(In my research, almost half of kernel messages don't specify loglevel
but there are messages for debugging to some extent. So our possibility
of successful identification of issuing file will become much better
than now.)
- You can't activate/deactivate this feature after booting.
The following is example of kernel messages with this feature activated.
================================================================================
Linux version 2.6.1-1.138.2.1custom (root@xxxxxx) (gcc version 3.3.2 20040119
(Red Hat Linux 3.3.2-8)) #1 Mon Apr 19 19:33:34 JST 2004
arch/i386/kernel/setup.c(473)BIOS-provided physical RAM map:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ * Here is a file name and line number, and so on.
arch/i386/kernel/setup.c(795)0MB HIGHMEM available.
arch/i386/kernel/setup.c(798)1024MB LOWMEM available.
On node 0 totalpages: 262144
DMA zone: 4096 pages, LIFO batch:1
Normal zone: 258048 pages, LIFO batch:16
HighMem zone: 0 pages, LIFO batch:1
arch/i386/kernel/dmi_scan.c(135)DMI present.
drivers/acpi/tables.c(547)ACPI: RSDP (v000 PTLTD ) @ 0x000f74e0
drivers/acpi/tables.c(100)ACPI: RSDT (v001 PTLTD RSDT 0x06040000 LTP 0x000
00000) @ 0x3fefbdb3
:
. <Skip the rest>
:
================================================================================
Lastly, if this ML is not suitable for my proposal, and you know suitable ML,
please let me know.
Regards,
Y.Ishikawa
Attachment:
linux-2.6.1-1.138.2.1-loglevel.patch
Description: Binary data
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