Comment 320 for bug 620074

2.6.30-rc2

fsync-tester shows mostly < 1 second, except a few times when it goes just above 1 sec.

fsync time: 0.1964
fsync time: 0.2317
fsync time: 0.2923
fsync time: 0.0565
fsync time: 1.1033
fsync time: 0.2297
fsync time: 0.0124

fsync time: 0.0848
fsync time: 0.1049
fsync time: 0.6525
fsync time: 11.1130 <--- not sure what that was
fsync time: 2.2619
fsync time: 0.3535
fsync time: 0.1543
fsync time: 0.2699

Unfortunately, the load average shoots up, peaking at about 8 before I run out of space on the disk. System responsiveness is also affected, but don't have a meaningful measurable quantity.

top - 21:41:06 up 16 min, 6 users, load average: 7.23, 5.93, 3.98
top - 21:42:19 up 17 min, 7 users, load average: 8.12, 6.53, 4.34

procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
 r b swpd free buff cache si so bi bo in cs us sy id wa
 0 9 0 19428 10752 2681252 0 0 180 13957 1344 497 2 9 30 59
 1 8 0 20100 10780 2680416 0 0 0 47644 2883 1290 2 12 0 86
 0 9 0 18908 10816 2681888 0 0 0 22528 2819 858 2 11 0 88
 0 10 0 20116 10828 2680952 0 0 4 25080 2865 781 2 7 0 92
 0 9 0 18900 10844 2682280 0 0 4 32696 3496 835 0 11 0 90
 0 9 0 19040 10876 2681736 0 0 0 29936 3060 1064 1 10 0 89
 2 8 0 18880 10892 2680868 0 0 4 47736 2954 731 0 7 0 92
 0 9 0 18180 10920 2681448 0 0 0 44160 2723 971 0 13 0 87

/dev/sda4 /home ext3 rw,relatime,errors=continue,data=writeback 0 0