[Qemu-devel] Re: [PATCH 0/3] Fix guest time drift under heavy load.

[Jan Kiszka]

Gleb Natapov wrote:
> Resending one more time. There was no response last time I've sent it.
> 
> Qemu device emulation for timers might be inaccurate and
> causes coalescing of several IRQs into one. It happens when the
> load on the host is high and the guest did not manage to ack the
> previous IRQ. The first patch in the series fixes this by changing
> qemu_irq subsystem to return IRQ delivery status information.
> If device is notified that IRQs where lost it can regenerate them
> as needed. The following two patches add IRQ regeneration to PIC and RTC
> devices.

s/PIC/PIT. :)

I must have overslept the first posting. In fact, we are currently
discussing such measures for our scenario as well - we are also
suffering from lost PIT IRQs. So I will definitely give your series a
try next week!

Jan

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