On Tue, 3 Oct 2000, Adam Sampson wrote:
> On Tue, Oct 03, 2000 at 01:54:55PM -0300, Rik van Riel wrote:
> > > It always happens the same although I can't repeat it on demand.
> > > Start a kernel compile and go read mail. Somewhere upon
> > > switching mail folders in netscape it locks. Box is _never_
> > > under swap when this occurs. Wish it would at least log
> > > _something_ to report.
> >
> > That sounds suspiciously like something going to sleep
> > and not being woken up again ...
>
> I had an interesting one yesterday (when I was running
> test9-pre7 with the reiserfs and Riel VM patches)---I came back
> to my machine which was running X to find that it had apparently
> locked (display had frozen, mouse and keyboard had no effect). I
> then tried the normal last-ditch Alt-SysRq-s to get it to sync,
> and it burst back to life as if nothing had happened...
Interesting. That might mean that something was sleeping on
bdflush (kflushd), while at the same time kflushd was sleeping
and never woke up (at least, not until you sent it a signal).
Hmm, now that you mention it...
The reschedule point in flush_dirty_buffers() looks suspect.
Are we /sure/ that a task going to sleep there is in
TASK_RUNNING mode?
regards,
Rik
--
"What you're running that piece of shit Gnome?!?!"
-- Miguel de Icaza, UKUUG 2000
http://www.conectiva.com/ http://www.surriel.com/
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