softirqd

From: kernwek jalsl (edityacomm_at_yahoo.com)
Date: 11/17/03

  • Next message: Krzysztof Benedyczak: "Re: [PATCH] POSIX message queues - syscalls & SIGEV_THREAD" 
    Date:	Mon, 17 Nov 2003 01:45:51 -0800 (PST)
To: linux-kernel@vger.kernel.org

    Hi All;

    On my embedded board I see that the preemption
    patch(Love etal.) is not of much use because of the
    following reaons:

    1) calling the scheduler after the hardirq returns is
    not of much use because the actual work of puting the
    task in the run queue is done in the bottom half
    executed by ksoftirqd
    2) ksoftirqd is not a real time thread

    Will the preemption patch work better if the ksoftirqd
    is made a real time thread?

    Another related question : has anyone thought of
    introducing prioirty among tasklets? Right now
    ksoftirqd treats them in a FIFO manner. Adding
    priority among the various tasklets and making sure
    that ksoftirqd looks ahead in the queue would ensure a
    real time treatment to a real time interrupt...

    I am sorry in case this has been discussed earlier; in
    case it has been I would like someone to post me the
    URl for the discussion.

    Regards

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  • Next message: Krzysztof Benedyczak: "Re: [PATCH] POSIX message queues - syscalls & SIGEV_THREAD"