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SubjectRe: [2.4.17/18pre] VM and swap - it's really unusable
On Tue, 8 Jan 2002, Daniel Phillips wrote:

> The preemptible kernel can reschedule, on average, sooner than the
> scheduling-point kernel, which has to wait for a scheduling point to
> roll around.

The preemptible kernel ALSO has to wait for a scheduling point
to roll around, since it cannot preempt with spinlocks held.

Considering this, I don't see much of an advantage to adding
kernel preemption.


"Linux holds advantages over the single-vendor commercial OS"
-- Microsoft's "Competing with Linux" document

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