Luck, Tony wrote:
+ia64 - is safe_halt call racy vs interrupts? (does it >sleep?) (See #4a)
safe_halt() makes a call to PAL[1] to go to a lower power state. It does
not do anything that would require a sleep.
So it won't need an interrupt to be revived out of that state?
Thank you Tony, I'll take ia64 off the list.
Ummm ... no. The processor will stay in the low power state until
an unmasked external interrupt occurs (or one of several other more
intrusive events like reset, machine check, PMI occur).
OK, so ia64's got the interrupt race as well I think?
I don't suppose safe_halt can be called with interrupts off
safely, like the i386 function of the same name?
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