El Thu, Jan 17, 2008 at 05:49:32PM +0530 Kathiresan, Lekshmanan ha dit:
>
> I have written code to create ordinary file from Linux kernel
> module. This code is working fine in normal execution, but its hangs when
> this function called from hook function or ISR.
>
> Please advice me, what should I do to solve this problem.
>
> Suppose if I remove variable arguments from this function. Its give
> error "Failed to write". This problem comes only when I call from hook or
> ISR.
Writing a file from an ISR doesn't sound like a good idea to me. I
suppose your problem is that your code blocks in vfs_write() or one of
the other calls that might block. I think you'd do better writing to a
(preallocated) buffer and write this buffer in a non-atomic context
where sleeping is allowed.
--
Matthias Kaehlcke
Linux System Developer
Barcelona
The assumption that what currently exists must necessarily
exist is the acid that corrodes all visionary thinking
.''`.
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