Re: [PATCH v3 2/3] vhost: Add smp_rmb() in vhost_enable_notify()

On Thu, Mar 28, 2024 at 10:21:48AM +1000, Gavin Shan wrote: A smp_rmb() has been missed in vhost_enable_notify(), inspired by Will. Otherwise, it's not ensured the available ring entries pushed by guest can be observed by vhost in time, leading to stale available ring entries fetched by vhost in

[PATCH v3 2/3] vhost: Add smp_rmb() in vhost_enable_notify()

A smp_rmb() has been missed in vhost_enable_notify(), inspired by Will. Otherwise, it's not ensured the available ring entries pushed by guest can be observed by vhost in time, leading to stale available ring entries fetched by vhost in vhost_get_vq_desc(), as reported by Yihuang Yu on NVidia's