I'm running another fsck on a 4.x system ... I know 5.x brings in the background mode for it, which would definitely make my life easier, *but* ... when running fsck, it says its using up 99% of the CPU: # ps aux | grep fsck root 67 99.0 5.0 184252 184284 p0 R+ 12:46PM 254:16.68 fsck -y /vm now, its a dual CPU system ... on an MP system, is it not possible to have it parallelize on a file system, so that it makes use of all available CPU? For instance, right now, its in Phase 4 ... on a file system where ctl-t shows: load: 0.99 cmd: fsck 67 [running] 15192.26u 142.30s 99% 184284k /dev/da0s1h: phase 4: cyl group 408 of 866 (47%) wouldn't it be possible, on a dual CPU system, to have group 434 and above run on one process, while group 433 and below running on the second, in parallel? Its not like the drives are being beat up: # iostat 5 tty da0 pass0 cpu tin tout KB/t tps MB/s KB/t tps MB/s us ni sy in id 0 44 0.00 0 0.00 0.00 0 0.00 40 0 0 0 60 0 11 0.00 0 0.00 0.00 0 0.00 50 0 0 0 50 0 6 0.00 0 0.00 0.00 0 0.00 50 0 0 0 50 0 6 0.00 0 0.00 0.00 0 0.00 50 0 0 0 50 0 6 0.00 0 0.00 0.00 0 0.00 50 0 0 0 50 0 6 0.00 0 0.00 0.00 0 0.00 50 0 0 0 50 0 6 16.00 0 0.00 0.00 0 0.00 50 0 0 0 50 0 6 0.00 0 0.00 0.00 0 0.00 50 0 0 0 50 0 6 0.00 0 0.00 0.00 0 0.00 50 0 0 0 50 0 45 16.00 0 0.01 0.00 0 0.00 50 0 0 0 50 0 6 0.00 0 0.00 0.00 0 0.00 50 0 0 0 50 0 6 0.00 0 0.00 0.00 0 0.00 50 0 0 0 50 0 6 16.00 0 0.00 0.00 0 0.00 50 0 0 0 50 0 4600 16.00 3 0.04 0.00 0 0.00 49 0 1 0 50 0 18 16.00 0 0.01 0.00 0 0.00 50 0 0 0 50 0 16 16.00 1 0.01 0.00 0 0.00 50 0 0 0 50 So, it looks to me like the process is CPU bound, not disk ... Or, does 5.x's fsck already make better use of available CPUs? ---- Marc G. Fournier Hub.Org Networking Services (http://www.hub.org) Email: scrappy_at_hub.org Yahoo!: yscrappy ICQ: 7615664Received on Fri Sep 03 2004 - 19:01:45 UTC
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