Re: 8.0-RC2: ZFS deadlock with zfs receive

(Resending to the list, I replied only to Pawel)

On Oct 31, 2009, at 12:28 AM, Pawel Jakub Dawidek wrote:

> On Thu, Oct 29, 2009 at 03:52:45PM -0600, Stef Walter wrote:
>> Borja Marcos wrote:
>>> I've been sending some alltraces to pjd about this easy to reproduce
>>> problem. I am using zfs send/zfs receive to replicate a dataset  
>>> from one
>>> server to another. At 1 minute intervals, an incremental snapshot is
>>> sent to update the dataset copy. If there is reading activity on the
>>> dataset copy, a deadlock can happen rendering ZFS and all the FS
>>> subsystem unusable. I've tried with 8.0RC2 and it still happens.
>
> I was able to reproduce it, but I don't have fix yet.
>
>> FWIW, another (or the same) zfs recv deadlock I've been trying to  
>> get to
>> the bottom of:
>>
>> http://lists.freebsd.org/pipermail/freebsd-fs/2009-October/ 
>> 006999.html
>
> Could you guys recompile your kernel after uncommenting line:
>
> #CFLAGS+=-DDEBUG=1
>
> in sys/modules/zfs/Makefile?
>