Aurelien Jarno wrote:
Hi,
As announced by Ralf Baechle, dyntick is now available on MIPS. I gave a
try on QEMU/MIPS, and unfortunately it doesn't work correctly.
In some cases the kernel schedules an event very near in the future,
which means the timer is scheduled a few cycles only from its current
value. Unfortunately under QEMU, the timer runs too fast compared to the
speed at which instructions are execution.
Sounds like a kernel bug. Can't there conceivably exist real hardware
(or a real timeout) that exhibits the same timing?
Especially today with variable clock frequencies, I don't see how the
kernel can rely on exact timing.
--
Any sufficiently difficult bug is indistinguishable from a feature.
