Description of problem: The machine shows 90% iowait, and thus CPU is heavly utilized though no heavy process is running on the system. We have found that this happens once the nfs service gets started. Version-Release number of selected component (if applicable): 2.4.21-47.ELsmp nfs-utils-1.0.6-44EL How reproducible: boot the machine and run top 17:13:07 up 19:55, 2 users, load average: 1.03, 1.45, 1.51 63 processes: 62 sleeping, 1 running, 0 zombie, 0 stopped CPU states: cpu user nice system irq softirq iowait idle total 0.2% 0.0% 0.5% 0.2% 0.3% 81.1% 17.7% cpu00 0.2% 0.0% 0.2% 0.2% 0.6% 78.6% 20.2% cpu01 0.2% 0.0% 0.8% 0.2% 0.0% 83.6% 15.2% Mem: 2055236k av, 1894172k used, 161064k free, 0k shrd, 434180k buff 1332488k actv, 113116k in_d, 28584k in_c Swap: 2096440k av, 0k used, 2096440k free 1081172k cached PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME CPU COMMAND 5546 root 15 0 0 0 0 SW 0.2 0.0 5:22 0 nfsd 5553 root 15 0 0 0 0 SW 0.2 0.0 5:34 1 nfsd 5552 root 15 0 0 0 0 SW 0.1 0.0 5:15 1 nfsd 20119 root 15 0 1092 1092 888 S 0.1 0.0 0:01 0 top 20265 root 15 0 1088 1088 884 R 0.1 0.0 0:00 1 top 1 root 15 0 300 300 240 S 0.0 0.0 0:05 1 init 2 root RT 0 0 0 0 SW 0.0 0.0 0:00 0 migration/0 3 root RT 0 0 0 0 SW 0.0 0.0 0:00 1 migration/1 4 root 15 0 0 0 0 SW 0.0 0.0 0:05 1 keventd 5 root 34 19 0 0 0 SWN 0.0 0.0 0:00 0 ksoftirqd/0 6 root 34 19 0 0 0 SWN 0.0 0.0 0:00 1 ksoftirqd/1 9 root 15 0 0 0 0 SW 0.0 0.0 0:03 1 bdflush 7 root 15 0 0 0 0 SW 0.0 0.0 2:19 1 kswapd 8 root 15 0 0 0 0 SW 0.0 0.0 0:00 0 kscand 10 root 15 0 0 0 0 SW 0.0 0.0 0:37 0 kupdated 11 root 25 0 0 0 0 SW 0.0 0.0 0:00 0 mdrecoveryd 18 root 25 0 0 0 0 SW 0.0 0.0 0:00 0 scsi_eh_0 21 root 15 0 0 0 0 SW 0.0 0.0 0:03 1 kjournald 76 root 15 0 0 0 0 SW 0.0 0.0 0:00 0 khubd 667 root 15 0 0 0 0 SW 0.0 0.0 1:00 0 kjournald 668 root 15 0 0 0 0 SW 0.0 0.0 0:21 1 kjournald 669 root 15 0 0 0 0 SW 0.0 0.0 2:22 1 kjournald 670 root 25 0 0 0 0 SW 0.0 0.0 0:00 1 kjournald 671 root 15 0 0 0 0 SW 0.0 0.0 0:50 0 kjournald 672 root 15 0 0 0 0 SW 0.0 0.0 0:00 1 kjournald 673 root 15 0 0 0 0 SW 0.0 0.0 0:00 0 kjournald 674 root 15 0 0 0 0 SW 0.0 0.0 0:00 0 kjournald 675 root 15 0 0 0 0 SW 0.0 0.0 0:00 1 kjournald 676 root 15 0 0 0 0 SW 0.0 0.0 0:03 0 kjournald Steps to Reproduce: 1. 2. 3. Actual results: load average exceeds 1, though no process is running Expected results: load average should be low, and iowait should be near 0% Additional info:
*** This bug has been marked as a duplicate of 219464 ***