Re: [PATCH] kvm: Faults which trigger IO release the mmap_sem

Radim Krčmář
2014-09-17T11:27:14Z

2014-09-17 13:26+0300, Gleb Natapov:
> For async_pf_execute() you do not need to even retry. Next guest's page fault
> will retry it for you.

Wouldn't that be a waste of vmentries?

The guest might be able to handle interrupts while we are waiting, so if
we used async-io-done notifier, this could work without CPU spinning.
(Probably with added latency.)