top io mode

jhell jhell at
Thu Nov 25 16:03:42 UTC 2010

On 11/25/2010 06:28, Adam Vande More wrote:
> top io doesn't seem to display stats when dealing direct with a block device
> like so:
> dd if=/dev/ada0 of=/dev/null
> However if dd runs on a regular file eg
> dd if=test.file of=/dev/null
> then stats are reported in top.
> Is this the expected behavior?

Is this on ZFS ?

If that is the case it is a known problem that needs the following patch
to fix the issue.

I believe it is planned to be MFC'd but am not quite sure so I have CC'd
Andriy and he should be able to advise further.




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