RE: 2.2.16 Alpha: "Fix SMP rescheduling with lock held"

["Greg Lindahl" <glindahl hpti com>]

> I take it these
> messages indicate the hang is around 2 seconds, which makes sense
> given I send 16MB over 100Mb Enet,

That depends on the detail. Are you running PVM in daemon mode or using
direct routing? Even if you were sending 16 MB in a single blocking send, it
should not hold the kernel lock while you're doing it. If so, it would be a
generic kernel bug...

strace is a very good utility (if it's functioning on alphas these days) to
figure out what kinds of system calls you're making.

-- g