On Tue, May 30, 2017 at 07:58:06PM +0300, Michael S. Tsirkin wrote: > On Tue, May 30, 2017 at 07:26:37PM +0300, Michael S. Tsirkin wrote: > > On Fri, May 26, 2017 at 03:31:33PM -0400, bfields@xxxxxxxxxxxx wrote: > > > Looks like the culprit is very likely d85b758f72b0 "virtio_net: fix > > > support for small rings". > > > > > > After that patch, my NFS server VM stops responding to packets after a > > > few minutes of testing. Before that patch, my server keeps working. > > > > > > --b. > > > > Others complained about that too. > > I'm still trying to reproduce though. > > > > Meanwhile, could you please locate this line of code: > > + vi->rq[i].min_buf_len = mergeable_min_buf_len(vi, vi->rq[i].vq); > > > > and add something like > > printk(KERN_ERR, "min buf = 0x%x expected 0x%x size 0x%x big %d\n", > > vi->rq[i].min_buf_len, GOOD_PACKET_LEN, > > virtqueue_get_vring_size(vi->rq[i].vq), > > (int)vi->big_packets); > > > > after it? > > Then boot and capture the output. > > > > Thanks! > > > > Also, can you pls print the mergeable_rx_buffer_size attribute from > sysfs for this device? On 4.12-rc1: # cat # /sys/devices/pci0000:00/0000:00:03.0/virtio0/net/eth0/queues/rx-0/virtio_net/mergeable_rx_buffer_size 320 --b. _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
