[lkml]   [2005]   [Oct]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: 2.6.14-rc4-rt7

    * Daniel Walker <> 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() .

    yeah, it is reversed. I 'fixed' it a couple of releases ago - but in
    fact it was correct previously and i introduced this bug. I have fixed
    this in my tree and have released -rt9 with the fix.

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2005-10-18 22:28    [W:0.020 / U:81.336 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site