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Diffstat (limited to 'Documentation/debugging-modules.txt')
| -rw-r--r-- | Documentation/debugging-modules.txt | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/Documentation/debugging-modules.txt b/Documentation/debugging-modules.txt new file mode 100644 index 000000000..172ad4aec --- /dev/null +++ b/Documentation/debugging-modules.txt @@ -0,0 +1,22 @@ +Debugging Modules after 2.6.3 +----------------------------- + +In almost all distributions, the kernel asks for modules which don't +exist, such as "net-pf-10" or whatever. Changing "modprobe -q" to +"succeed" in this case is hacky and breaks some setups, and also we +want to know if it failed for the fallback code for old aliases in +fs/char_dev.c, for example. + +In the past a debugging message which would fill people's logs was +emitted. This debugging message has been removed. The correct way +of debugging module problems is something like this: + +echo '#! /bin/sh' > /tmp/modprobe +echo 'echo "$@" >> /tmp/modprobe.log' >> /tmp/modprobe +echo 'exec /sbin/modprobe "$@"' >> /tmp/modprobe +chmod a+x /tmp/modprobe +echo /tmp/modprobe > /proc/sys/kernel/modprobe + +Note that the above applies only when the *kernel* is requesting +that the module be loaded -- it won't have any effect if that module +is being loaded explicitly using "modprobe" from userspace. |