is realtime device supported?

[Wengang Wang]

Hi experts,

Do we support realtime device?

I got the following error:

[root at desk test-xfsprogs]# mkfs.xfs -rrtdev=/dev/sda12,extsize=4096
/dev/sda10 -f
meta-data=/dev/sda10             isize=256    agcount=4, agsize=1250558
blks
         =                       sectsz=512   attr=2
data     =                       bsize=4096   blocks=5002231, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0
log      =internal log           bsize=4096   blocks=2560, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=0
realtime =/dev/sda12             extsz=4096   blocks=2502115,
rtextents=2502115
[root at desk test-xfsprogs]# mount /dev/sda10 /xfs
mount: Function not implemented
[root at desk test-xfsprogs]# mount -ortdev=/dev/sda12 /dev/sda10 /xfs
mount: Function not implemented

regards,
wengang.