zpool import hangs when out of space - Was: zfs pool import hangs on [tx->tx_sync_done_cv]

[Steven Hartland]

----- Original Message ----- 
From: "Marcus Reid" <marcus at blazingdot.com>


> On Thu, Oct 16, 2014 at 03:56:23AM +0100, Steven Hartland wrote:
>> Fix for this has now been committed:
>> https://svnweb.freebsd.org/changeset/base/273158
>> 
>> I'm already talking with re@ to get this in to the 10.1 release.
> 
> Thank you for that.  I looked at your thread on the illumos zfs list,
> and from what I gather, if you aren't wedged into a state where you have
> to import read-only, you don't have to worry about leaked data in your
> pool, correct?
> 
> I always have a small number of 'deferred free' blocks that's always
> somewhere between 8 and 10:
> 
>     9 108K 15.5K 108K 12.0K 6.97   0.00 deferred free
> 
> Also, if you run 'zdb -bb <pool>' on a live pool, you can get a bunch
> of:
> 
>  leaked space: vdev 0, offset 0x16464c2000, size 1048576
>  ...
> 
> and then:
> 
>  block traversal size 14586265600 != alloc 14667571200 (leaked 81305600)
> 
> which I believe is normal and unrelated.

Yep thats normal.

    Regards
    Steve