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| author | Stephen Kitt <steve@sk2.org> | 2020-02-18 13:59:17 +0100 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2020-02-19 03:34:13 -0700 |
| commit | 0317c5371e6a9b71a2e25b47013dd5c62d55d1a6 (patch) | |
| tree | 975c9cd4db8d95da0704be704ef74314ea3dbac9 | |
| parent | a3cb66a508528e9082cba8303b4f31767e7743a2 (diff) | |
| download | lwn-0317c5371e6a9b71a2e25b47013dd5c62d55d1a6.tar.gz lwn-0317c5371e6a9b71a2e25b47013dd5c62d55d1a6.zip | |
docs: merge debugging-modules.txt into sysctl/kernel.rst
This fits nicely in sysctl/kernel.rst, merge it (and rephrase it)
instead of linking to it.
Signed-off-by: Stephen Kitt <steve@sk2.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
| -rw-r--r-- | Documentation/admin-guide/sysctl/kernel.rst | 14 | ||||
| -rw-r--r-- | Documentation/debugging-modules.txt | 22 |
2 files changed, 13 insertions, 23 deletions
diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst index 4872610cc491..bb56ff25d947 100644 --- a/Documentation/admin-guide/sysctl/kernel.rst +++ b/Documentation/admin-guide/sysctl/kernel.rst @@ -387,7 +387,19 @@ This flag controls the L2 cache of G3 processor boards. If modprobe ======== -See Documentation/debugging-modules.txt. +This gives the full path of the modprobe command which the kernel will +use to load modules. This can be used to debug module loading +requests:: + + 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 + +This only applies when the *kernel* is requesting that the module be +loaded; it won't have any effect if the module is being loaded +explicitly using ``modprobe`` from userspace. modules_disabled diff --git a/Documentation/debugging-modules.txt b/Documentation/debugging-modules.txt deleted file mode 100644 index 172ad4aec493..000000000000 --- a/Documentation/debugging-modules.txt +++ /dev/null @@ -1,22 +0,0 @@ -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. |