Re: [PATCH V5 1/6] vhost: introduce vhost_vring_call

On 2020/8/4 下午5:21, Zhu, Lingshan wrote:

quoted

quoted

Hi Jason,

we use this lock to protect the eventfd_ctx and irq from race 
conditions,

We don't support irq notification from vDPA device driver in this 
version, do we still have race condition?

as we discussed before:
(1)if vendor change IRQ after DRIVER_OK, through they should not do this, but they can.
(2)if user space changes ctx.

Thanks

Yes, but then everything happens in context of syscall (ioctl), so vq 
mutex is sufficient I guess?

Thanks