On 08/23/2009 02:56 PM, Gleb Natapov wrote:
Does msi actually care about the states? I don't think it does.
That is the point. MSI doesn't care, but we don't know if GSI is MSI or
not.
So we toggle the bits needlessly. Just like with edge-triggered interrupts.
If we can avoid it why not?
It simplifies the code. You do it at the kvm_set_irq() entry point
regardless of whether the interrupt is level-triggered, edge-triggered,
or msi. As a bonus, you only do it once (not twice for pic/ioapic
interrupts).
All interrupts connected through one GSI are shared, so why not keep
the level information shared as well?
If we will keep sharing info at irq routing table level how will we recalculate
sharing state when irq routing table changes?
Good question. Move from old table to new table? but that interferes
with rcu.
Okay, at irqchip level is better after all.
--
error compiling committee.c: too many arguments to function
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