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    SubjectRe: 2.6.14-rc4-rt7
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    On Tue, 2005-10-18 at 08:42 +0200, Ingo Molnar wrote:
    > * Daniel Walker <dwalker@mvista.com> wrote:
    >
    > > I found this latency ~5 minutes after boot up, no load . It looks like
    > > vgacon_scroll() has a memset like operation which can grow.
    >
    > do you have PRINTK_IGNORE_LOGLEVEL enabled? If yes then much of the
    > printk code will run with interrupts disabled - hence non-preemptable.
    > PRINTK_IGNORE_LOGLEVEL is a debugging feature for developers. I have
    > added an extra explanation to the Kconfig, see below.

    I was just running a "make defconfig" and I enabled latency tracing .
    PRINTK_IGNORE_LOGLEVEL defaults to off (doesn't it?), and I didn't make
    any changes to it . Unless it get switched on by something else ..

    It looks like the logic might be reversed in release_console_sem() .

    Daniel

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