c92c2d6926
caused hangs on SMP systems under load. My theory was that an interrupted thread was migrating and returning to PAL on a different CPU and that that caused the hangs. To prevent this, I used the recently added sched_pin() API to pin the interrupted thread to the CPU that received the interrupt across ithread_schedule() to prevent migration. This seems to have fixed the hangs based on tests by several folks on the alpha@ list. Tested by: wilko, tisco, several others on alpha@ |
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