[dm-devel] dm: dm-zoned: Ignore last smaller runt zone

[Damien Le Moal]

Mike,

On 10/31/17 05:05, Mike Snitzer wrote:
> On Sat, Oct 28 2017 at  3:39am -0400,
> Damien Le Moal <damien.lemoal at wdc.com> wrote:
> 
>> The scsi layer allows ZBC drives to have a smaller last runt zone. For
>> such device, specifying the entire capacity for a dm-zoned target table
>> entry fails as the specified capacity is not aligned on the device zone
>> size indicated in the request queue structure of the device.
>>
>> Fix this problem by ignoring the last runt zone in the entry length
>> when seting up the dm-zoned target (ctr method) and when iterating table
>> entries of the target (iterate_devices method). This allows dm-zoned
>> users to still easily setup a target using the entire device capacity
>> (as mandated by dm-zoned) or the aligned capacity excluding thelast runt
>> zone.
>>
>> While at it, replace direct references to the device queue chunk_sectors
>> limit with calls to the accessor blk_queue_zone_sectors().
>>
>> Reported-by: Peter Desnoyers <pjd at ccs.neu.edu>
>> Signed-off-by: Damien Le Moal <damien.lemoal at wdc.com>
> 
> Applied for 3.15 (also cc'd stable@)

Thank you. Since this is a bug fix, I was hoping to get this in 4.14 as
this is scheduled as an LTS. Is it too late for that ?

-- 
Damien Le Moal,
Western Digital