Re: send_sig can't work

[Seth Arnold <sarnold@wirex.com>]

On Mon, Apr 08, 2002 at 10:29:21AM +0800, Ù¡³¤´ï wrote:
> Hello I wrote an interrupt service routin that send sig to user space
> program to inform some event happed,(My kernel version is 2.0.38) I am
> sure that (according prink message) the signal has been send to
> program "a", send_sig(SIGUSR1, p, 1); and the user space program catch
> the signal SIGUSR1,(by using kill -10 pid, i know that it is ok), when
> the interrupt happen, the kernel indeed call the send_sig function,
> but the user space progamme didn't catch the signal , Why. I can't fix
> out this problem. 

tongchangda, your emails would be easier to read if you wrapped your
lines at 72 characters.

(a) Why use 2.0.38? 2.0.40-rc4 is out -- if you could test it to see if
your device doesn't run with it, I'm sure the maintainer of the 2.0 tree
would appreciate hearing about. (Maybe not. :)

(b) If calling send_sig() doesn't work, take a look at what the
sys_kill() function does, and try emulating it -- keeping in mind that
since you are calling from kernel memory space rather than user memory
space, any copy_from_user stuff is likely not needed.

Good luck.

-- 
http://immunix.org/

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