On Fri, May 25, 2018 at 10:31:26AM +0800, Jason Wang wrote:

On 2018年05月22日 16:16, Tiwei Bie wrote:

quoted

Hello everyone,

This RFC implements packed ring support in virtio driver.

Some simple functional tests have been done with Jason's
packed ring implementation in vhost (RFC v4):

https://lkml.org/lkml/2018/5/16/501

Both of ping and netperf worked as expected w/ EVENT_IDX
disabled. Ping worked as expected w/ EVENT_IDX enabled,
but netperf didn't (A hack has been added in the driver
to make netperf test pass in this case. The hack can be
found by `grep -rw XXX` in the code).

Looks like this is because a bug in vhost which wrongly track signalled_used
and may miss an interrupt. After fixing that, both side works like a charm.

I'm testing vIOMMU and zerocopy, and will post a new version shortly. (Hope
it would be the last RFC version).

Great to know that. Thanks a lot! :)

Best regards,
Tiwei Bie