Messages in this thread | | | From | Keith Owens <> | Subject | i386 IPI handlers running with hardirq_count == 0 | Date | Thu, 29 Jun 2006 19:01:17 +1000 |
| |
Macro arch/i386/kernel/entry.S::BUILD_INTERRUPT generates the code to handle an IPI and call the corresponding smp_<name> C code. BUILD_INTERRUPT does not update the hardirq_count for the interrupted task, that is left to the C code. Some of the C IPI handlers do not call irq_enter(), so they are running in IRQ context but the hardirq_count field does not reflect this. For example, smp_invalidate_interrupt does not set the hardirq count.
What is the best fix, change BUILD_INTERRUPT to adjust the hardirq count or audit all the C handlers to ensure that they call irq_enter()?
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |