xfs_admin -c 1 + xfs_repair problem

[Daniel Bast <daniel.bast@xxxxxxx>]

Hi,

i tried to enable lazy counts with "xfs_admin -c 1 device" with 
xfs_admin from xfsprogs 2.9.8. Unfortunately that process got stuck 
without any message. After several hours without any IO or CPU workload 
i killed the process and started xfs_repair, but that also got stuck (in 
"Phase 6") without any IO or CPU workload or any extra message. The 
xfs_repair being stuck in "Phase 6" is reproduceable with a 
metadump-image of the filesystem.
I was able to mount the device but don't want to use it because i'm not 
sure if everything is ok.
How can i resolve that problem? What information do you need? I can 
provide the metadump image (bzip compressed: 28MB) if necessary.
Here are some informations that are maybe useful:

 xfs_repair -v /dev/sda7
 Phase 1 - find and verify superblock...
         - block cache size set to 11472 entries
 Phase 2 - using internal log
         - zero log...
 zero_log: head block 2 tail block 2
         - scan filesystem freespace and inode maps...
         - found root inode chunk
 Phase 3 - for each AG...
         - scan and clear agi unlinked lists...
         - process known inodes and perform inode discovery...
         - agno = 0
         - agno = 1
         - agno = 2
         - agno = 3
         - process newly discovered inodes...
 Phase 4 - check for duplicate blocks...
         - setting up duplicate extent list...
         - check for inodes claiming duplicate blocks...
         - agno = 0
         - agno = 1
         - agno = 2
         - agno = 3
 Phase 5 - rebuild AG headers and trees...
         - agno = 0
         - agno = 1
         - agno = 2
         - agno = 3
         - reset superblock...
 Phase 6 - check inode connectivity...
         - resetting contents of realtime bitmap and summary inodes
         - traversing filesystem ...
         - agno = 0


after the killed xfs_admin -c 1 and xfs_repair processes:
xfs_info /dev/sda7
meta-data=/dev/sda7              isize=256    agcount=4, agsize=24719013 
blks
         =                       sectsz=512   attr=2
data     =                       bsize=4096   blocks=98876050, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096
log      =internal               bsize=4096   blocks=32768, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=65536  blocks=0, rtextents=0


a new 'xfs_repair -v /dev/sda7' straced:
strace -ff -p 6364
Process 6409 attached with 6 threads - interrupt to quit
[pid  6364] futex(0x851e2cc, FUTEX_WAIT, 2, NULL <unfinished ...>
[pid  6405] futex(0xb146e3d8, FUTEX_WAIT, 0, NULL <unfinished ...>
[pid  6406] futex(0xb146e358, FUTEX_WAIT, 1, NULL <unfinished ...>
[pid  6407] futex(0xb146e358, FUTEX_WAIT, 2, NULL <unfinished ...>
[pid  6408] futex(0xb146e358, FUTEX_WAIT, 3, NULL <unfinished ...>
[pid  6409] futex(0xb146e358, FUTEX_WAIT, 4, NULL <unfinished ...>
[pid  6406] <... futex resumed> )       = -1 EAGAIN (Resource 
temporarily unavailable)
[pid  6407] <... futex resumed> )       = -1 EAGAIN (Resource 
temporarily unavailable)
[pid  6408] <... futex resumed> )       = -1 EAGAIN (Resource 
temporarily unavailable)
[pid  6406] futex(0xb146e358, FUTEX_WAIT, 4, NULL <unfinished ...>
[pid  6407] futex(0xb146e358, FUTEX_WAIT, 4, NULL <unfinished ...>
[pid  6408] futex(0xb146e358, FUTEX_WAIT, 4, NULL


Thanks
 Daniel

P.S. Please CC me, because i'm not subscribed to the list.