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    SubjectRe: [PATCH] mfd: speedup twl4030 irq response time and decrease irq disable time
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    CC genirq guys

    2010/9/28 Mark Brown <broonie@opensource.wolfsonmicro.com>:
    > On Tue, Sep 28, 2010 at 08:25:24AM +0800, Ming Lei wrote:
    >> 2010/9/27 Samuel Ortiz <sameo@linux.intel.com>:
    >
    >> > Wouldn't converting your twl4030_irq_thread() to the threaded IRQ framework
    >> > fix that problem ?
    >
    >> IRQ_DISABLED flag is set by disable_irq_nosync called from PIH handler,
    >> then thread function can't be executed in irq thread function, so we can't
    >> convert this to threaded IRQ framework simply.
    >
    > Have you raised this issue with the genirq guys?  This sounds like
    > something that the core infrastructure should be able to cope with.
    >

    Even genirq guys can help us to convert to irq thread framework, I
    don't think there is good way to set priority for one irq thread.

    For twl4030, if we can make twl4030_irq_thread to run at higher
    priority than that of other irq thread, the PIH irq disable time can be
    decreased further since other irq thread waken up by twl4030_irq_thread
    can preempt the running of twl4030_irq_thread, and the PIH irq will be
    enabled until complete of twl4030_irq_thread.

    thanks,
    --
    Lei Ming
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