From: Claudio Scordino <cloud.of.andor@gmail.com>
To: linux-kernel@vger.kernel.org
Subject: ktimer not firing ?
Date: Mon, 16 Jan 2006 09:45:46 -0500
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Cc: Steven Rostedt <rostedt@goodmis.org>, kernelnewbies@nl.linux.org,
       Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>
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Hi,

   I know that ktimer is not yet part of the main tree of the Linux
kernel...

I need an high precision timer in a kernel module for 2.6.14, so I chose to 
use ktimers.

My timer must be stopped and reprogrammed very frequently.

This is how I initialize the timer:

struct ktimer mytimer;
ktimer_init(&mytimer);
mytimer.function = myfunction;
mytimer.data = NULL;


This is how I stop the timer:

ktimer_cancel(&mytimer);


This is how I restart the timer:

ktime_t mytime = ktime_set(...,...);
ktimer_start(&mytimer, &mytime, KTIMER_REL)


However, the timer never fires. I checked the return value of the start and 
it's correct (0 = success). Any idea of why the timer does not fire ?

I tried also by directly using ktimer_restart instead of ktimer_cancel + 
ktimer_start, but the timer does not fire either.
The module has also another ktimer which works perfectly...


Many thanks for your help,

                     Claudio

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