Rodrigo Rosenfeld Rosas wrote: > I began to experience a problem since 2.6.17 when shutting down my PC. > > I noticed the problem just after I recompiled my kernel to enable the SMI > workaround. I, then rebooted the new kernel and when I tried to shutdown the > system, it stopped on "will halt now" message or something like. > > The same behavior is occurring both in home (Pentium-3 550 MHz) and at > college (P4-1.7GHz). In both systems, Xenomai advised me to enable SMI > workaround. Actually, at home, the worst latency with the latency test was > about 20us independently from enabling or not the SMI workaround. > > Do someone else experienced a similar problem when upgrading to 2.6.17?
Yep. Should be fixed now, see latest trunk. It was a deadlock due to clumsy unregistration of the reboot notifier from its own handler. I think the locking of the kernel changed in 2.6.17 (RCU) and made this fatal. Jan PS: 20us on a P-III 550 is a bit too good. I guess some serious load is missing (cache load, IRQs, ...).
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