Re: vfs.zfs.bclone_enabled (was: FreeBSD 14.0-BETA2 Now Available)

From: Martin Matuska <>
Date: Mon, 18 Sep 2023 05:31:46 UTC
I vote for enabling block cloning on main :-)


On 16. 9. 2023 19:14, Alexander Motin wrote:
> On 16.09.2023 01:25, Graham Perrin wrote:
>> On 16/09/2023 01:28, Glen Barber wrote:
>>> o A fix for the ZFS block_cloning feature has been implemented.
>> Thanks
>> I see 
>> <>, 
>> with 
>> <> 
>> in stable/14.
>> As vfs.zfs.bclone_enabled is still 0 (at least, with 15.0-CURRENT 
>> n265350-72d97e1dd9cc): should we assume that additional fixes, not 
>> necessarily in time for 14.0-RELEASE, will be required before 
>> vfs.zfs.bclone_enabled can default to 1?
> I am not aware of any block cloning issues now.  All this thread about 
> bclone_enabled actually started after I asked why it is still 
> disabled. Thanks to Mark Millard for spotting this issue I could fix, 
> but now we are back at the point of re-enabling it again.  Since the 
> tunable does not even exist anywhere outside of FreeBSD base tree, I'd 
> propose to give this code another try here too.  I see no point to 
> have it disabled at least in main unless somebody needs time to run 
> some specific tests first.