Benjamin Herrenschmidt wrote:
> Beware though that some G4s have a nasty bug that prevents
> using the performance counter interrupt (and the thermal interrupt
> as well).
MPC7400 version 1.2 and lower have this problem.
> The problem is that if any of those fall at the same
> time as the DEC interrupt, the CPU messes up it's internal
> state and you lose SRR0/SRR1, which means you can't recover
> from the exception.
But the worst that happens is that you lose that process, isn't
it? Not all that big a problem, esp. since the window in which
this can happen is very small.
Segher
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This archive was generated by hypermail 2b29 : Sat Mar 15 2003 - 22:00:20 EST