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Except for many unimplemented things (listed in the TODO file), there may be |
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true bugs too. If you experience any problems, do not hesitate to mail |
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lm78@stimpy.netroedge.com. But read the documentation first, please! |
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Pre-2.1.58 /proc directory Oops |
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=============================== |
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There is a problem in pre 2.1.58 kernels that can make the kernel Oops. You |
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can trigger this Oops if you have opened any file, or are in any directory, |
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created by a module. If you remove the module at such a moment, successive |
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access to those files or directories will make the kernel complain through |
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an Oops. There is really no good way to solve this. Stock kernel modules |
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exhibit the same problem, by the way. Kernels from 2.1.58 onwards have new |
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fill_inode() semantics; using this function, we can increase the module use |
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count while a module file or directory is accessed. This solves the problem, |
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because it makes it impossible to remove the module. |
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Alan Cox (alan@lxorguk.ukuu.org.uk), the maintainer of 2.0 kernels, has |
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said he will consider patches that backport this 2.1 feature; perhaps it |
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will be in 2.0.37. Until then, be careful when you unload modules. |
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2.2.x cdrom.o Oops |
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================== |
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|
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Module cdrom.o in all 2.2 kernels conflicts with our sensors.o module. |
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You can get an Oops if cdrom.o is unloaded after sensors.o was loaded. |
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Below is a small diff that you can apply to the kernel to correct this. |
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Another solution is to make sure cdrom.o is never unloaded, or to make |
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sure it is not a module but compiled into the kernel proper. |
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|
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The diff corrects a long-standing /proc bug. It will go into kernel 2.2.2 |
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or later in a somewhat modified form. It was written by Jens Axboe |
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<axboe@image.dk>. |
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|
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-----cut here----- |
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--- virgin/kernel/sysctl.c Sat Jan 9 07:54:16 1999 |
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+++ linux/kernel/sysctl.c Mon Feb 1 23:44:58 1999 |
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@@ -559,12 +559,12 @@ |
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unregister_proc_table(table->child, de); |
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} |
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/* Don't unregister proc directories which still have |
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- entries... */ |
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- if (!((de->mode & S_IFDIR) && de->subdir)) { |
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+ entries or are still being used... */ |
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+ if (!((de->mode & S_IFDIR) && de->subdir) && !de->count) |
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{ |
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proc_unregister(root, de->low_ino); |
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table->de = NULL; |
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kfree(de); |
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- } |
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+ } |
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} |
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} |
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-----cut here----- |
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|
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Kernel i2c conflict |
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=================== |
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An older version of the i2c modules is distributed in 2.2 and late 2.1 |
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kernels. If you try to use it at the same moment as our i2c modules, you |
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may get into trouble. This should be fixed for lm_sensors-2.4.0 and newer. |
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