lots of "md: export_rdev(sde)" printed after create IMSM RAID10 with missing

[Yi Zhang <yizhan@redhat.com>]

Hello

I tried create one IMSM RAID10 with missing, found lots of "md: export_rdev(sde)" printed, anyone could help check it?

Steps I used:
mdadm -CR /dev/md0 /dev/sd[b-f] -n5 -e imsm
mdadm -CR /dev/md/Volume0 -l10 -n4 /dev/sd[b-d] missing

Version:
4.8.0-rc5
mdadm - v3.4-84-gbd1fd72 - 25th August 2016

Log: 
http://pastebin.com/FJJwvgg6

<6>[  301.102007] md: bind<sdb>
<6>[  301.102095] md: bind<sdc>
<6>[  301.102159] md: bind<sdd>
<6>[  301.102215] md: bind<sde>
<6>[  301.102291] md: bind<sdf>
<6>[  301.103010] ata3.00: Enabling discard_zeroes_data
<6>[  311.714344] ata3.00: Enabling discard_zeroes_data
<6>[  311.721866] md: bind<sdb>
<6>[  311.721965] md: bind<sdc>
<6>[  311.722029] md: bind<sdd>
<5>[  311.733165] md/raid10:md127: not clean -- starting background reconstruction
<6>[  311.733167] md/raid10:md127: active with 3 out of 4 devices
<6>[  311.733186] md127: detected capacity change from 0 to 240060989440
<6>[  311.774027] md: bind<sde>
<6>[  311.810664] md: md127 switched to read-write mode.
<6>[  311.819885] md: resync of RAID array md127
<6>[  311.819886] md: minimum _guaranteed_  speed: 1000 KB/sec/disk.
<6>[  311.819887] md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for resync.
<6>[  311.819891] md: using 128k window, over a total of 234435328k.
<6>[  316.606073] ata3.00: Enabling discard_zeroes_data
<6>[  343.949845] capability: warning: `turbostat' uses 32-bit capabilities (legacy support in use)
<6>[ 1482.314944] md: md127: resync done.
<7>[ 1482.315086] RAID10 conf printout:
<7>[ 1482.315087]  --- wd:3 rd:4
<7>[ 1482.315089]  disk 0, wo:0, o:1, dev:sdb
<7>[ 1482.315089]  disk 1, wo:0, o:1, dev:sdc
<7>[ 1482.315090]  disk 2, wo:0, o:1, dev:sdd
<7>[ 1482.315099] RAID10 conf printout:
<7>[ 1482.315099]  --- wd:3 rd:4
<7>[ 1482.315100]  disk 0, wo:0, o:1, dev:sdb
<7>[ 1482.315100]  disk 1, wo:0, o:1, dev:sdc
<7>[ 1482.315101]  disk 2, wo:0, o:1, dev:sdd
<7>[ 1482.315101]  disk 3, wo:1, o:1, dev:sde
<6>[ 1482.315220] md: recovery of RAID array md127
<6>[ 1482.315221] md: minimum _guaranteed_  speed: 1000 KB/sec/disk.
<6>[ 1482.315222] md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for recovery.
<6>[ 1482.315227] md: using 128k window, over a total of 117217664k.
<6>[ 2697.184217] md: md127: recovery done.
<7>[ 2697.524143] RAID10 conf printout:
<7>[ 2697.524144]  --- wd:4 rd:4
<7>[ 2697.524146]  disk 0, wo:0, o:1, dev:sdb
<7>[ 2697.524146]  disk 1, wo:0, o:1, dev:sdc
<7>[ 2697.524147]  disk 2, wo:0, o:1, dev:sdd
<7>[ 2697.524148]  disk 3, wo:0, o:1, dev:sde
<6>[ 2697.524632] md: export_rdev(sde)
<6>[ 2697.549452] md: export_rdev(sde)
<6>[ 2697.568763] md: export_rdev(sde)
<6>[ 2697.587938] md: export_rdev(sde)
<6>[ 2697.607271] md: export_rdev(sde)
<6>[ 2697.626321] md: export_rdev(sde)
<6>[ 2697.645676] md: export_rdev(sde)
<6>[ 2697.663211] md: export_rdev(sde)
<6>[ 2697.681603] md: export_rdev(sde)
<6>[ 2697.699117] md: export_rdev(sde)
<6>[ 2697.716510] md: export_rdev(sde)

Best Regards,
  Yi Zhang