On Mon, Feb 24, 2020 at 09:44:28PM +0800, Hillf Danton wrote: > > On Mon, 24 Feb 2020 11:08:53 +0100 Stefano Garzarella wrote: > > On Sun, Feb 23, 2020 at 03:50:25PM +0800, Hillf Danton wrote: > > > > > > Seems like vsock needs a word to track lock owner in an attempt to > > > avoid trying to lock sock while the current is the lock owner. > > > > Thanks for this possible solution. > > What about using sock_owned_by_user()? > > > No chance for vsock_locked() if it works. > > > We should fix also hyperv_transport, because it could suffer from the same > > problem. > > > You're right. My diff is at most for introducing vsk's lock owner. Sure, thanks for this! > > > At this point, it might be better to call vsk->transport->release(vsk) > > always with the lock taken and remove it in the transports as in the > > following patch. > > > > What do you think? > > > Yes and ... please take a look at the output of grep > > grep -n lock_sock linux/net/vmw_vsock/af_vsock.c > > as it drove me mad. :-) I'll go in this direction and I'll check all the cases. We should avoid to take lock_sock in the transports when it is possible. Thanks for the help, Stefano
