[Ocfs2-devel] [bug] dead lock when truncate file

[Ling, Xiaofeng]

svn 1343 kernel 2.6.6
Step:
On node A, call truncate(filename, size) in loop and at the same time,
call stat
to filename at node B
Result
On node A, the process went into "D" status
On node B, the process exit regular.

The call stack on Node A for truncate
schedule
ocfs_lookup_file_allocation
ocfs_get_block
ocfs2_zero_extend
ocfs_setattr
sys_truncate

It is in some down fail.
Not sure whether it fails in down_read(&OCFS_I(inode)->ip_io_sem);
or
down(&OCFS_I(inode)->ip_sem)

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