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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2011-05-17 15:15:30 +0300
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2011-05-23 08:22:20 +0300
commit56e46742e846e4de167dde0e1e1071ace1c882a5 (patch)
treeffed000ab5bb33d482878bd72420474bdab1eec4 /Documentation
parentbdc1a1b6100c78a6002b1761ebe36d5fe8f8585b (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')
-rw-r--r--Documentation/filesystems/ubifs.txt25
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