Re: [patch 0/3] j_state_lock, j_list_lock, remove-bitlocks

Lee Revell
2005-03-17T15:41:30Z

On Thu, 2005-03-17 at 02:15 -0500, Steven Rostedt wrote:
>
> On Wed, 16 Mar 2005, Lee Revell wrote:
>
> > I am a bit confused, big surprise. Does this thread still have anything
> > to do with this trace from my "Latency regressions" bug report?
>
> Don't worry, I've been in a state of confusion for a long time now ;-)
>
> >
> > http://www.alsa-project.org/~rlrevell/2912us
> >
> > The problem only is apparent with PREEMPT_DESKTOP and "data=ordered".
> >
> > PREEMPT_RT has always worked perfectly.
> >
>
> I'm surprise that PREEMPT_RT does work. I'm no longer sure that this does
> affect your latency anymore. It probably does indirectly somehow. I
> still think it has to do with the bitspinlocks. But I'm not sure. Just
> let me know if you want to be taken off this thread and I'll remove you
> from my CC list. Until then, I'll keep you on.

Sorry, it's hard to follow this thread. Just to make sure we're all on
the same page, what exactly is the symptom of this ext3 issue you are
working on? Is it a performance regression, or a latency issue, or a
lockup - ?

Whatever your problem is, I am not seeing it.

Lee