On 28/08/14 21:03, Andy Lutomirski wrote: > [removed virtio-dev -- I'm sick of bounces] > > On Thu, Aug 28, 2014 at 11:55 AM, Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote: >> Il 28/08/2014 20:29, Christian Borntraeger ha scritto: >>>>>>> block seems to work, with net a simple ping works, iperf causes this: >>>>> >>>>> I neither see the bug, nor can I reproduce it on x86_64 on KVM. I >>>>> doubt that dma vs. non-dma is relevant. I tried -net user a -net tap >>>>> with iperf running in both directions. I also tried switching >>>>> virtio_pci into non-DMA-API mode. No errors. >>>>> >>>>> Is there any chance that you could instrument that BUG_ON to print n, >>>>> i, in_sgs, out_sgs, total_sg, total_in, and total_out? I assume this >>>>> is some oddity with patch 1, but I'm mystified. >>> Yes, its triggered by patch 1. >> >> What version of QEMU? Can you two cat the "features" file in the >> virtio-net device's sysfs directory? > > With vhost=on: > > # cat /sys/class/net/eth0/device/features > 0000011000000001111101010001110000000000000000000000000000000000 > > Without vhost=on: > > # cat /sys/class/net/eth0/device/features > 0000011000000001111101010001110000000000000000000000000000000000 > > Instrumenting the code says that indirect=1. > > --Andy > I have 1100011111111111111101010001110000000000000000000000000000000000 _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
