[Lustre-discuss] 1.6.4.1 - LBUG on MDS

[Niklas Edmundsson]

Lustre 1.6.4.1 on Ubuntu Dapper with Debian 2.6.18 AMD64 kernel. MDS 
LBUG:ed with:

-------------8<--------------------
Jan 12 10:39:40 LustreError: 6198:0:(mds_reint.c:1512:mds_orphan_add_link()) ASSERTION(inode->i_nlink == 1) failed:dir nlink == 0
Jan 12 10:39:40 LustreError: 6198:0:(mds_reint.c:1512:mds_orphan_add_link()) LBUG
Jan 12 10:39:40 Lustre: 6198:0:(linux-debug.c:168:libcfs_debug_dumpstack()) showing stack for process 6198
Jan 12 10:39:41 LustreError: dumping log to /tmp/lustre-log.1200130781.6198
-------------8<--------------------

I also have the lustre-log.1200130781.6198, but it seems to contain 
binary data so I'll supply it only if it's needed.

The following triggered the bug:
- mkdir rfiles
- in rfiles create 300000 files of random size 0-32k
- rm -rf rfiles &
- sleep 600 (ie. wait until you get bored and the rm isn't finished).
- rm -rf rfiles &

This suggests that something isn't locked properly since two 
concurrent rm's in a directory definitely shouldn't cause the MDS so 
fall over...


/Nikke
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