Messages in this thread | | | Date | Thu, 09 Dec 2010 13:12:10 -0800 | From | Jeremy Fitzhardinge <> | Subject | Re: [PATCH] Fix when booting Xen+Linux under QEMU. |
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On 12/09/2010 01:01 PM, Konrad Rzeszutek Wilk wrote: > Please take a look. The first patch just cleans up the find_unbound_irq > so it is easier to understand what it does. > > The second patch hardness the Xen IRQ (event channels) allocation finder > if you try to boot a minimalistic 32-bit Linux kernel along with a > Xen hypervisor under QEMU. > > We end up with a weird scenario where the nr_irq_gsi was greater than nr_irq > by 16. This code hardness it by pointing out the issue to the user and tries > to continue - BUT this might impact the PCI device allocation. > > Tested also on normal machine with no regressions found.
I think I'd prefer to:
1. move to using all dynamic irqs, and use the core kernel irq allocator (ie, resurrect IanC's patches) 2. kill the ioapic dummy page hack (I'm assuming that would be trivial - at least to make it all zero - because the kernel won't care about the number of GSIs at that point)
J
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