exp...@hope.cz put forth on 4/16/2010 6:17 AM:
> Stan,
> Thank you for your reply.
> It is my own daemon( I wrote it by myself) and do not know why it changes the 
> STAT.
> 
> I found out that STAT field is
> D   for  Uninterruptible sleep (usually IO)
> R  for   Running or runnable (on run queue)
> S   for  Interruptible sleep (waiting for an event to complete)
> 
> but what does Uninterruptible sleep means? And what is it caused by?
> Can anyone explain that problem?
> (When STAT is D for the  daemon , the daemon does not seem to run )

Sounds like the daemon is waiting for an IO which never completes.  Thus it
never wakes.

-- 
Stan


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