DragonFly BSD
DragonFly kernel List (threaded) for 2010-04
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Re: I/O scheduler (aka dsched)

From: Chris Turner <c.turner@xxxxxxxxxxxxxxxxxxx>
Date: Thu, 01 Apr 2010 00:08:27 +0000

Magnus Eriksson wrote:
The ionice priority is similar to nice, but the levels nice values range
from 0 to 10, and unlike the usual nice, 10 is the highest priority and 0
the lowest. Usage is exactly the same as nice:

I think the principle of least surprise would suggest that it should work exactly like nice, rather than flip it around, or people will get confused why the misbehaving program continues to eat all IO even after they reniced it. :-)

nice is actually intuitive - the higher the number, the 'nicer' the processes are to the rest of the system..

negative nice => "mean"

it's just *system* relative - not process relative..

perhaps a commentary on our modern individualistic nature, that we get this wrong..

or something..

shutting up now.

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