On Tue, 20 Jun 2006 17:37:32 +1000
Nick Piggin <[email protected]> wrote:
> >>Kernel panic - not syncing: nmi watchdog
>
> Any ideas what it might be waiting on?
Readers, I guess. When there's a spinning writer, nothing prevents _new_
readers from getting into the read-locked region. If we have enough
readers and the read-locked region is long enough, there's always at least
one reader in the read-locked region and the writer is permanently starved.
> Otherwise, a straight rwlock->spinlock conversion will have a few more
> scalability issues, but I'd guess it wouldn't be a problem at all for
> most workloads on most systems.
It beats crashing.
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