Re: [Qemu-devel] [PATCH] Limit ptimer rate to something achievable

2012-04-24 Thread Anthony Liguori
On 04/20/2012 12:32 AM, Peter Chubb wrote: If a guest sets very short timeouts, and asks for a timer to be reloaded on timeout, QEMU can go to 100%CPU utilisation and become unresponsive, as it is spending all its time generating timeout interrupts. On real hardware this doesn't matter, as the

[Qemu-devel] [PATCH] Limit ptimer rate to something achievable

2012-04-19 Thread Peter Chubb
If a guest sets very short timeouts, and asks for a timer to be reloaded on timeout, QEMU can go to 100%CPU utilisation and become unresponsive, as it is spending all its time generating timeout interrupts. On real hardware this doesn't matter, as the interrupts are just coalesced, and the