Locked up processes after upgrade to ZFS v15

[Jeremy Chadwick]

On Tue, Oct 12, 2010 at 05:12:57PM +0300, Andriy Gapon wrote:
> on 12/10/2010 16:02 Jeremy Chadwick said the following:
> > And then applied your patch.  However, the result doesn't induce a
> > lock-up.  Bummer.
> > 
> > testbox# ./sendfile
> > 1..11
> > ok 1
> > ok 2
> > ok 3
> > ok 4
> > ok 5
> > ok 6
> > ok 7
> > ok 8
> > ok 9
> > ok 10
> > ok 11
> > mmap test
> > testbox#
> > 
> > Other stuff I tried:
> > 
> > - Verified getpagesize() returns 4096 (PAE isn't enabled on this box;
> >   I'm assuming PAE results in 2MByte pages is why I mention it)
> > - Enabling the #if 0'd code
> > - Adjusting TEST_EXTRA a bit (200, 1000, and 3819; just numbers I
> >   pulled out of thin air)
> > 
> 
> Do you have DTrace support on the test system?

Nope, but since it's a single-CPU system I can probably enable it
safely (I thought I remember something about CTF not working right on
SMP systems...).  Give me a little while to figure out how to get it
working, assuming you're willing to step me through what I need to do to
simulate the lock condition.  :-)

-- 
| Jeremy Chadwick                                   jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |