I/O load

Hi,

Finding the source of I/O load:

echo 1 > /proc/sys/vm/block_dump
dmesg /*add grep | sort | head | whatever you like*/

[23303.008133] jbd2/sda7-8(3588): WRITE block 73544 on sda7
[23303.009090] jbd2/sda5-8(1315): WRITE block 2506872 on sda5
[23303.009169] jbd2/sda5-8(1315): WRITE block 8740776 on sda5
[23303.009189] jbd2/sda5-8(1315): WRITE block 8740784 on sda5
[23303.009204] jbd2/sda5-8(1315): WRITE block 8740792 on sda5
[23303.012135] syslog-ng(3725): READ block 1572968 on sda5
[23303.012168] syslog-ng(3725): READ block 1573000 on sda5
[23303.012201] syslog-ng(3725): READ block 1573064 on sda5
[23303.012221] syslog-ng(3725): READ block 1573080 on sda5
[23303.012243] syslog-ng(3725): READ block 1573104 on sda5
[23303.012261] syslog-ng(3725): READ block 1573176 on sda5
[23303.068168] syslog-ng(3725): dirtied inode 14390 (everything.log) on sda5
[23303.068194] syslog-ng(3725): dirtied inode 14390 (everything.log) on sda5
[23303.068205] syslog-ng(3725): dirtied inode 14390 (everything.log) on sda5
[23303.068525] syslog-ng(3725): dirtied inode 14386 (kernel.log) on sda5
[23303.068543] syslog-ng(3725): dirtied inode 14386 (kernel.log) on sda5
[23303.068552] syslog-ng(3725): dirtied inode 14386 (kernel.log) on sda5
[23303.072523] jbd2/sda5-8(1315): WRITE block 8740800 on sda5
[23307.374341] bash(30701): READ block 417840 on sda5
[23307.408615] bash(30701): dirtied inode 7275 (dmesg) on sda5
[23309.008101] jbd2/sda5-8(1315): WRITE block 2711320 on sda5
[23309.008156] jbd2/sda5-8(1315): WRITE block 2806184 on sda5
[23309.008229] jbd2/sda5-8(1315): WRITE block 8740808 on sda5
[23309.008248] jbd2/sda5-8(1315): WRITE block 8740816 on sda5
[23309.008262] jbd2/sda5-8(1315): WRITE block 8740824 on sda5
[23309.020531] jbd2/sda5-8(1315): WRITE block 8740832 on sda5
[23312.836095] flush-8:0(1348): WRITE block 19660808 on sda7
[23312.836137] flush-8:0(1348): WRITE block 19660832 on sda7
[23312.836159] flush-8:0(1348): WRITE block 19661496 on sda7
[23312.836178] flush-8:0(1348): WRITE block 19968464 on sda7
[23312.836288] flush-8:0(1348): WRITE block 0 on sda7
[23312.836307] flush-8:0(1348): WRITE block 8 on sda7
[23315.008123] jbd2/sda5-8(1315): WRITE block 8740840 on sda5
[23315.008246] jbd2/sda5-8(1315): WRITE block 8740848 on sda5
[23315.018987] jbd2/sda5-8(1315): WRITE block 8740856 on sda5
[..]
[23384.161854] firefox(30716): WRITE block 4107056 on sda7
[23384.161860] firefox(30716): WRITE block 4107064 on sda7
[23384.161867] firefox(30716): WRITE block 4107072 on sda7
[23384.161873] firefox(30716): WRITE block 4107080 on sda7
[23384.161880] firefox(30716): WRITE block 4107088 on sda7
[23384.161886] firefox(30716): WRITE block 4107096 on sda7
[23384.161952] firefox(30716): WRITE block 4107104 on sda7
[23384.161960] firefox(30716): WRITE block 4107112 on sda7
[23384.161967] firefox(30716): WRITE block 4107120 on sda7
[23384.161974] firefox(30716): WRITE block 4107128 on sda7
[23384.161980] firefox(30716): WRITE block 4107136 on sda7
[23384.161987] firefox(30716): WRITE block 4107144 on sda7
[23384.161993] firefox(30716): WRITE block 4107152 on sda7
[23384.161999] firefox(30716): WRITE block 4107160 on sda7
[23384.162006] firefox(30716): WRITE block 4107168 on sda7
[23384.162013] firefox(30716): WRITE block 4107176 on sda7
[23384.162019] firefox(30716): WRITE block 4107184 on sda7
[23384.162026] firefox(30716): WRITE block 4107192 on sda7
[23384.162033] firefox(30716): WRITE block 4107200 on sda7
[23384.162039] firefox(30716): WRITE block 4107208 on sda7
[23384.162047] firefox(30716): WRITE block 4107216 on sda7