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KernelTrap: Debating The Merits Of Kernel Preemption

“In response to a recent bug report on the lkml, Jeff Garzik,
the maintainer of the Serial ATA subsystem and network device
drivers, had some harsh words for kernel preemption. In the bug
report it was mention that kernel preemption was enabled to which
Jeff replied, ‘I strongly recommend disabling kernel preemption. It
is a hack that hides bugs.’ The comment lead into an interesting
discussion.

“Jeff’s two main points were that kernel preemption potentially
hides long latency code paths that should instead be fixed, and
that it potentially introduces bugs..”

Complete
Story