Re: [kvm-devel] still seeing network freezes with rtl8139 nic

[david a. <da...@ci...>]

david ahern wrote:
> Avi Kivity wrote:
>> - the in-kernel ioapic is buggy and needs the extra kicking the
>> optimization prevents.  Can be checked by re-adding the optimization to
>> kvm_ioapic_set_irq() (keeping it removed in qemu).  If it works, the
>> problem is in userspace.  If it fails, the problem is in the kernel.
>>
>> Something like
>>
>>  static int old_level[16];
>>
>>  if (level == old_level[irq])
>>     return;
>>  old_level[irq] = level;
>>

With the "if (!change) return;" taken out of pci_set_irq() and the above code
added to kvm_ioapic_set_irq() networking froze.

david