[PATCH 03/18] xfs: define sparse inode chunks v5 sb feature bit and helper function

[Mark Tinguely]

On 07/24/14 12:37, Brian Foster wrote:
> On Thu, Jul 24, 2014 at 12:08:36PM -0500, Mark Tinguely wrote:
>> On 07/24/14 09:22, Brian Foster wrote:
>>> The sparse inode chunks feature will use the helper function to enable
>>> the allocation of sparse inode chunks. The incompatible feature bit is
>>> set on disk once a sparse inode chunk is allocated to prevent older
>>> drivers from mounting an fs with sparse chunks.
>>>
>>> Note that the feature is hardcoded disabled and the feature bit not
>>> included in the all features mask until fully implemented.
>>>
>>> Signed-off-by: Brian Foster<bfoster at redhat.com>
>>> ---
>>
>> Sorry if I missed it in the series but is there an
>> XFS_FSOP_GEOM_FLAGS_SPINODES for xfs_info/growfs?
>>
>
> Nope, looks like I missed it. It probably slipped my mind as I haven't
> got into userspace yet and thus hadn't thought about xfs_info. I'll make
> a note to add it, thanks!
>
> Brian

Again forgive my quick scanning of the series, but am I correct in 
thinking that this does not change the minimum number of reserved blocks 
for create like fs ops. The create/rename do some attempts to continue 
when it cannot get the full number of reserved blocks. Would allocating 
a sparse inode chunk make sense in that case? My gut says the 
complication does not.

Thanks again,

--Mark.