Re: [PATCH net-next V4 5/5] vhost: access vq metadata through kernel virtual address

[Jason Wang]

On 2019/1/24 äå12:53, Michael S. Tsirkin wrote:
> > > > - How hard is it to figure out which mode uses which code.
> > It's as simple as tracing __get_user() usage in vhost process?
> >
> > Thanks
> Well there are now mtu notifiers etc etc. It's hardly as well
> contained as that.

We can setup filter out exactly what sets of function that we wan to 
trace. E.g we can only trace the usage of __get_user() and 
invalidate_range_start(). This should be sufficient.

In the long run, we may want to have some tracepoints for vhost_net.

Thanks