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From: nejhdeh <nejhdeh@aimedics.com>
To: linux-kernel@vger.kernel.org
Subject: Re: Basic question
Date: Fri, 23 Aug 2002 11:44:35 +1000	[thread overview]
Message-ID: <200208231144.35721.nejhdeh@aimedics.com> (raw)
In-Reply-To: <200207190831.55757.nejhdeh@aimedics.com>


Hi,
I have a question about fork() and messages..

For simplicity, I have a parent process that forks() two child processes (say 
pid1 & pid2).

How do I set priority levels of child1 vs child2. I want child1 to have a much 
higher priority level, since its going to read inputs from a serial device in 
the outside world?

Using basic signal calls say SIGUSR1, how can I communicate (without 
semaphores) between child1 and child2 through the parent? For instance if the 
child1 gets blocked forever trying to read the serial device then I want to 
notify the parent to kill child2??

Your time in this matter is greatly appreciated.


> Regards
>
> Nejhdeh Ghevondian

  parent reply	other threads:[~2002-08-23  1:42 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-07-18 22:31 nejhdeh
2002-07-25 12:53 ` Bill Davidsen
2002-08-23  1:44 ` nejhdeh [this message]
  -- strict thread matches above, loose matches on Subject: below --
2002-07-16  1:08 nejhdeh
2002-07-16 12:47 ` Erik Mouw
2001-08-01 20:44 Raghava Raju
2001-08-01 20:55 ` Richard B. Johnson
2001-08-01 21:04 ` Robert Love

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