Locked up processes after upgrade to ZFS v15

[Jeremy Chadwick]

On Tue, Oct 12, 2010 at 07:25:30PM +0300, Andriy Gapon wrote:
> on 12/10/2010 19:20 Jeremy Chadwick said the following:
> > On Tue, Oct 12, 2010 at 07:10:36PM +0300, Andriy Gapon wrote:
> >>> Secondly: the testbox is running kernel/world source from October 8th.
> >>> I *have not* applied your kernel patch at this point.  Just a FYI.
> >>
> >> OK, can you now retest with the patch?
> > 
> > Will do!  Should have results in the next hour or so (going to start the
> > buildkernel now).
> 
> Just in case: KERNFAST=1 makes things really fast :-)

Hmm, first time I've heard of that one.  Akin to something like NOCLEAN?
Ah, I'll just look it/the code up myself.  :-)

Anyway, system's rebuilt with your patch.  Seems to work!  The sendfile
regression test now returns to the shell after the mmap test, and the
DTrace script doesn't output any information, which I imagine is what's
supposed to happen given the criteria.

I'd say commit it!  :-)

Also, one thing which I'm sure users or SAs will ask in the meantime:
what's the workaround, at least for Apache 2.x?  Disable sendfile,
disable mmap, or both together?

-- 
| 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 |