A SystemTap update [LWN.net]

A SystemTap update

Posted Jan 30, 2009 3:15 UTC (Fri) by SEJeff (subscriber, #51588)
In reply to: A SystemTap update by ctg
Parent article: A SystemTap update

Actually the block_dump feature of modern 2.6 linux kernels will show you which processes are writing to which devices. I wrote a proof of concept script to show them:

http://www.digitalprognosis.com/opensource/scripts/top-di...

The output looks like this:
root@desktopmonster:~# ./top-disk-users
COMMAND PID NUM ACTION DEVICE
banshee-1 23999 8 READ sda9
kjournald 2494 131 WRITE sda5
kjournald 5182 5 WRITE sda8
pdflush 228 15 WRITE sda5
pdflush 228 1 WRITE sda8
pdflush 228 32 WRITE sda9

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