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

* 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() .

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.

Ingo
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-10-18 22:28    [from the cache]
©2003-2011 Jasper Spaans