[Q] xfs_growfs erro

["Choi Moonbong" <theadadv@xxxxxxxxxxxxxx>]

Hi.
 
I setup SGI XFS Release 1.0.1 & RedHat 7.1 & LVM 0.9.1Beta.
 
I want to grow & decrease LVM XFS partition.
I make 1024M LVM partition, and run mkfs.xfs.
I have 1024M xfs partition.
After I  use 'lvextend tool', grow my test lvm partion  to 2048M.
And I use xfs_growfs, grow block size 300000.
XFS partition is 1195200Kbyte now.
And I think more big partion, but my computer is below error.

xfs_growfs -D 300001 /mnt/01
meta-data=/mnt/01                isize=256    agcount=10, agsize=32768 blks
data     =                       bsize=4096   blocks=300000, imaxpct=25
            =                       sunit=0      swidth=0 blks, unwritten=0
naming   =version 2              bsize=4096
log      =internal               bsize=4096   blocks=1200
realtime =none                   extsz=65536  blocks=0, rtextents=0
xfs_growfs: ioctl failed - XFS_IOC_FSGROWFSDATA: Unknown error 990

What means above error?
What's problem?

Please Reply.
Thank you.

Choi Moonbong.