Group scheduling [LWN.net]

Group scheduling

Posted Oct 18, 2007 11:56 UTC (Thu) by paravoid (subscriber, #32869)
In reply to: Group scheduling by mingo
Parent article: Merged for 2.6.24

While this sounds interesting, I wonder what it's implications going to be on systems that
have not designed with that in mind.

e.g. a random process run by a user getting 50% while N processes of apache take the other
50%...

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Group scheduling

Posted Oct 18, 2007 15:33 UTC (Thu) by mingo (subscriber, #31122) [Link]

yes - anything that changes previous behavior can be "bad" for someone who expects exactly the same behavior as before.

that's why there is a config option for it that can be turned on or off. (and that's why the exact weight is configurable - often the benefits heavily outweigh the changed behavior and it's better to just adjust the defaults a bit - by for example giving the httpd user a higher weight.)