On Wed, 2012-11-21 at 21:26 +0200, Michael S. Tsirkin wrote: > On Wed, Oct 17, 2012 at 06:05:53PM +0200, Michael S. Tsirkin wrote: > > We can deliver certain interrupts, notably MSIX, > > from atomic context. > > Here's an untested patch to do this (compiled only). > > > > Changes from v2: > > Don't inject broadcast interrupts directly > > Changes from v1: > > Tried to address comments from v1, except unifying > > with kvm_set_irq: passing flags to it looks too ugly. > > Added a comment. > > > > Jan, you said you can test this? > > I have tested this with some networking workloads > and this patchset seems to work fine. > My setup isn't a good fit for benchmarking device > assignment though. > Alex, could you pls verifyu that this solves the > latency issue that you sometimes observe? > With this patchset device assignment latency should be > as fast as vfio.
Yep, that seems to cover the gap. My environment is too noisy to declare an absolute winner, but pci-assign and vfio-pci are now very, very similar under netperf TCP_RR with these patches. Thanks, Alex -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
