On Thu, 2005-04-14 at 16:15 +0800, qiang zeng wrote:
> The program works
> fine,but sometimes it hungs for no reason, for example, the LKM is
> loaded , but the pc is left alone with writing anything.
This sounds like some kind of locking/deadlock problem. Here are a few
things to think about.
Are you obtaining any locks?
Multiple locks at once?
Do you obtain them in the correct order and with the correct methods?
I notices you use lock_kernel(); From what I gather, this is kind of
frowned upon for performance and cleanliness reasons ;) Better to lock
ONLY what data you actually need to protect.
Also,
f = filp_open("/tmp/log.txt", O_CREAT | O_APPEND, 00600);
Look like you are attempting to do direct file I/O. Kernel code is not
the place for this kind of thing. What you SHOULD do is use one of the
kernelspace --> userspace communication mediums. I think the Netlink
architecture would work well for this sort of thing. Here is a good
Linux Journal link for Netlink: http://www.linuxjournal.com/article/7356
Hope this helps.
--
Jason J. Herne <hernejj@xxxxxxxxxxxx>
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