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Policy

Posted Nov 18, 2010 12:34 UTC (Thu) by nikanth (guest, #50093)
Parent article: TTY-based group scheduling

Now policy belongs to kernel space

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Policy belongs to kernel space

Posted Nov 18, 2010 16:36 UTC (Thu) by hmh (subscriber, #3838) [Link]

It always did belong to kernel space when it made sense to do so.

The correct way to go about it is: policy belongs where it can be *realistically* made to work best by default.

Every interface that requires a kernel->userspace->kernel roundtrip to set policy _for no other reason_ than the "policy belongs in userspace" mentality, is clearly the product of bad engineering.

Policy belongs to kernel space

Posted Nov 18, 2010 18:27 UTC (Thu) by vonbrand (subscriber, #4458) [Link]

The "policy is userspace" mentality is exactly one of the things that make Unixy systems flexible (and got Linux running from smartphones to Google). If it truly is setting policy, a roundtrip through the kernel won't be expensive enough to make any difference anyway.