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From: Frank R Callaghan <f.callaghan@ieee.org>
To: linux-mtd@lists.infradead.org
Date: Mon, 16 Jun 2003 14:21:23 -0400
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Subject: Re: Please Help, problem mounting jffs2
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On Monday 16 June 2003 12:25 pm, David Woodhouse wrote:
> On Mon, 2003-06-16 at 17:06, Frank R Callaghan wrote:
> > Hi All,
> >
> > I methodically removed code from my usrland programs until I'm left w=
ith
> >
> > int main()
> > {
> >     while(1) {
> >     //  sleep(1);
> >     }
> > }
> >
> > With no RTAI modules loaded, the gc thread still stalls.
> > With the sleep(1) works fine !
> >
> > Does this mean that the gc thread has such a low priority that it nev=
er
> > runs ?
>
> No, it looks like your userspace program has such a _high_ priority
> that the GC thread never runs. A subtle difference :)
>

I have reniced the test program to +20 but the mount is still hung !

> > What should I do/try next ?
>
> This is an RTAI-specific issue. I suspect your test program above has
> its priority set such that when it's eating 100% CPU time in a tight
> loop, nothing else gets to run. Have you asked on the RTAI mailing
> lists?

yes - no response yet !

I'm not sure how rtai can be interfering if there are no-rtai modules
loaded - unless the kernel patches messed something up !