Heavy I/O blocks FreeBSD box for several seconds

[Rick Macklem]

Abdriy Gapon wrote:
> on 31/07/2011 22:03 Rick Macklem said the following:
> > Ok, so if the scheduler spin lock is being held too long, what could
> > cause this, if it isn't a scheduler bug?
> >
> > I can't think of how NFS would affect this beyond causing a heavy
> > I/O
> > load, but if there is some way it does, I suppose I need to know
> > what
> > that is?
> 
> I think I've already referred to the thread on stable at .
> This is currently being investigated.
> 
> P.S.
> Just a pure illustration you can grep for thread_lock to see where
> else outside
> schedulers the sched locks are taken.
> --
Yes, I see what you mean (ie. it's all over the place).

Sorry about the noise, rick