On Sat, Apr 10, 2021 at 12:16 AM Michael S. Tsirkin <[email protected]> wrote: > > On Wed, Mar 31, 2021 at 04:05:12PM +0800, Xie Yongji wrote: > > Use vhost_dev->mutex to protect vhost device iotlb from > > concurrent access. > > > > Fixes: 4c8cf318("vhost: introduce vDPA-based backend") > > Cc: [email protected] > > Signed-off-by: Xie Yongji <[email protected]> > > Acked-by: Jason Wang <[email protected]> > > Reviewed-by: Stefano Garzarella <[email protected]> > > I could not figure out whether there's a bug there now. > If yes when is the concurrent access triggered? >
When userspace sends the VHOST_IOTLB_MSG_V2 message concurrently? vhost_vdpa_chr_write_iter -> vhost_chr_write_iter -> vhost_vdpa_process_iotlb_msg() Thanks, Yongji
