== sanity test 258b: verify i_mutex security behavior ==== 23:32:38 (1790393558) fail_loc=0x141d running as uid/gid/euid/egid 500/500/500/500, groups: 500 [dd] [if=/dev/zero] [of=/mnt/lustre/f258b.sanity] [bs=4k] [count=1] [oflag=append] 1+0 records in 1+0 records out 4096 bytes (4.1 kB, 4.0 KiB) copied, 0.00509215 s, 804 kB/s