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| author | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2011-05-17 15:15:30 +0300 |
|---|---|---|
| committer | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2011-05-23 08:22:20 +0300 |
| commit | 56e46742e846e4de167dde0e1e1071ace1c882a5 (patch) | |
| tree | ffed000ab5bb33d482878bd72420474bdab1eec4 /Documentation/filesystems/ubifs.txt | |
| parent | bdc1a1b6100c78a6002b1761ebe36d5fe8f8585b (diff) | |
UBIFS: switch to dynamic printks
Switch to debugging using dynamic printk (pr_debug()). There is no good reason
to carry custom debugging prints if there is so cool and powerful generic
dynamic printk infrastructure, see Documentation/dynamic-debug-howto.txt. With
dynamic printks we can switch on/of individual prints, per-file, per-function
and per format messages. This means that instead of doing old-fashioned
echo 1 > /sys/module/ubifs/parameters/debug_msgs
to enable general messages, we can do:
echo 'format "UBIFS DBG gen" +ptlf' > control
to enable general messages and additionally ask the dynamic printk
infrastructure to print process ID, line number and function name. So there is
no reason to keep UBIFS-specific crud if there is more powerful generic thing.
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'Documentation/filesystems/ubifs.txt')
| -rw-r--r-- | Documentation/filesystems/ubifs.txt | 25 |
1 files changed, 2 insertions, 23 deletions
diff --git a/Documentation/filesystems/ubifs.txt b/Documentation/filesystems/ubifs.txt index 7d17e5b91ff4..8e4fab639d9c 100644 --- a/Documentation/filesystems/ubifs.txt +++ b/Documentation/filesystems/ubifs.txt @@ -115,28 +115,8 @@ ubi.mtd=0 root=ubi0:rootfs rootfstype=ubifs Module Parameters for Debugging =============================== -When UBIFS has been compiled with debugging enabled, there are 3 module +When UBIFS has been compiled with debugging enabled, there are 2 module parameters that are available to control aspects of testing and debugging. -The parameters are unsigned integers where each bit controls an option. -The parameters are: - -debug_msgs Selects which debug messages to display, as follows: - - Message Type Flag value - - General messages 1 - Journal messages 2 - Mount messages 4 - Commit messages 8 - LEB search messages 16 - Budgeting messages 32 - Garbage collection messages 64 - Tree Node Cache (TNC) messages 128 - LEB properties (lprops) messages 256 - Input/output messages 512 - Log messages 1024 - Scan messages 2048 - Recovery messages 4096 debug_chks Selects extra checks that UBIFS can do while running: @@ -156,8 +136,7 @@ debug_tsts Selects a mode of testing, as follows: Failure mode for recovery testing 4 -For example, set debug_msgs to 5 to display General messages and Mount -messages. +For example, set debug_chks to 3 to enable general and TNC checks. References |