Remind me again what the patch actually does? It seems to be purely adding
Won't it just go BUG if someone boots the kernel and then tries to manually
Seems a bit racy too. setup_ioapic_dest() does:
pending_irq_balance_apicid[irq] = mask;
==> window here
ioapic_lock is not held, so there is a window where
pending_irq_balance_apicid[irq] can be set to some other value and
io_apic_write_affinity() will accidentally go BUG.
Is it not possible to fix set_ioapic_affinity() for real for clustered APIC
mode? What is involved in that?
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