Messages in this thread | | | Date | Tue, 30 Sep 2008 11:51:49 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH] x86: Reserve FIRST_DEVICE_VECTOR in used_vectors bitmap. |
| |
> Someone from the community found out, that after repeatedly unloading > and loading a device driver that uses MSI IRQs, the system eventually > assigned the vector initially reserved for IRQ0 to the device driver.
> The reason for this is, that although IRQ0 is tied to the > FIRST_DEVICE_VECTOR when declaring the irq_vector table, the > corresponding bit in the used_vectors map is not set. So, if vectors > are released and assigned often enough, the vector will get assigned > to another interrupt. This happens more often with MSI interrupts as > those are exclusively using a vector. > > Fix this by setting the bit for the FIRST_DEVICE_VECTOR in the bitmap.
hi, the IO-APIC code got unified in the x86 tree for v2.6.28.
So could you please send the fix against tip/master:
http://people.redhat.com/mingo/tip.git/README
Thanks,
Ingo
| |