root@fat /home/wfg# bin/test-tar-dd.sh umount: /dev/sda7: not mounted meta-data=/dev/sda7 isize=256 agcount=4, agsize=6170464 blks = sectsz=512 attr=2 data = bsize=4096 blocks=24681856, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 log =internal log bsize=4096 blocks=12051, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 bin/test-tar-dd.sh:14: no such file or directory: /debug/tracing/events/writeback/writeback_single_inode/enable 280.90 2235.98 1000+0 records in 1000+0 records out 1048576000 bytes (1.0 GB) copied, 14.8681 s, 70.5 MB/s dd if=/dev/zero of=/fs/zero bs=1M count=1000 0.00s user 1.48s system 9% cpu 14.888 total tar jxf /dev/shm/linux-2.6.38.3.tar.bz2 12.42s user 4.33s system 49% cpu 33.563 total 322.49 2524.47 elapsed: 288.99000000000024 # tracer: nop # # TASK-PID CPU# TIMESTAMP FUNCTION # | | | | | flush-8:0-2939 [006] 289.234869: writeback_queue_io: bdi 8:0: older=30000 enqueue=0 flush-8:0-2939 [006] 289.234872: writeback_queue_io: bdi 8:0: older=-1 enqueue=1 flush-8:0-2939 [000] 289.244973: writeback_queue_io: bdi 8:0: older=-1 enqueue=0 flush-8:0-2939 [000] 289.249918: writeback_queue_io: bdi 8:0: older=-1 enqueue=0 flush-8:0-2939 [000] 289.254722: writeback_queue_io: bdi 8:0: older=-1 enqueue=0 flush-8:0-2939 [000] 289.259679: writeback_queue_io: bdi 8:0: older=-1 enqueue=0 flush-8:0-2939 [000] 289.264460: writeback_queue_io: bdi 8:0: older=-1 enqueue=0 flush-8:0-2939 [002] 289.270664: writeback_queue_io: bdi 8:0: older=-1 enqueue=0 flush-8:0-2939 [002] 289.274682: writeback_queue_io: bdi 8:0: older=-1 enqueue=0 flush-8:0-2939 [002] 289.279065: writeback_queue_io: bdi 8:0: older=-1 enqueue=0 flush-8:0-2939 [002] 289.283450: writeback_queue_io: bdi 8:0: older=-1 enqueue=0 flush-8:0-2939 [002] 289.287875: writeback_queue_io: bdi 8:0: older=-1 enqueue=0 flush-8:0-2939 [002] 289.292278: writeback_queue_io: bdi 8:0: older=-1 enqueue=0 flush-8:0-2939 [002] 289.297190: 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