> On Apr 12, 2019, at 12:43 PM, Enji Cooper <yaneurab...@gmail.com> wrote:
> 
> 
>> On Apr 12, 2019, at 5:46 AM, Tycho Nightingale <tyc...@freebsd.org> wrote:
>> 
>> Author: tychon
>> Date: Fri Apr 12 12:46:25 2019
>> New Revision: 346150
>> URL: https://svnweb.freebsd.org/changeset/base/346150
>> 
>> Log:
>> for a cache-only zone the destructor tries to destroy a non-existent keg
>> 
>> Reviewed by: markj
>> Sponsored by:        Dell EMC Isilon
>> Differential Revision:       https://reviews.freebsd.org/D19835
> 
> 
> Hi Tycho!
>       Is the goal of this change to prevent a panic (with an INVARIANTS 
> kernel)?
> Thank you!
> -Enji

Hi,

The goal of this change is to fix a regression introduced in r343026.  It does 
cause a panic independent of INVARIANTS.  Fortunately there isn’t currently any 
in-tree code which triggers the panic.  It does however show up when running 
with the patch under review in D19845.

Tycho
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