search for: tun_net_close

...race by > > 1) Starting a process using tun and polls on it; > 2) Doing ip tun del tunXXX while the process is polling. > > tun: Only free a netdev when all tun descriptors are closed > > The commit c70f182940f988448f3c12a209d18b1edc276e33 ("tun: Fix > races between tun_net_close and free_netdev") fixed a race where > an asynchronous deletion of a tun device can hose a poll(2) on > a tun fd attached to that device. > > However, this came at the cost of moving the tun wait queue into > the tun file data structure. The problem with this is that it > i...

...race by > > 1) Starting a process using tun and polls on it; > 2) Doing ip tun del tunXXX while the process is polling. > > tun: Only free a netdev when all tun descriptors are closed > > The commit c70f182940f988448f3c12a209d18b1edc276e33 ("tun: Fix > races between tun_net_close and free_netdev") fixed a race where > an asynchronous deletion of a tun device can hose a poll(2) on > a tun fd attached to that device. > > However, this came at the cost of moving the tun wait queue into > the tun file data structure. The problem with this is that it > i...

As multi-queue nics were commonly used for high-end servers, current single queue based tap can not satisfy the requirement of scaling guest network performance as the numbers of vcpus increase. So the following series implements multiple queue support in tun/tap. In order to take advantages of this, a multi-queue capable driver and qemu were also needed. I just rebase the latest version of

As multi-queue nics were commonly used for high-end servers, current single queue based tap can not satisfy the requirement of scaling guest network performance as the numbers of vcpus increase. So the following series implements multiple queue support in tun/tap. In order to take advantages of this, a multi-queue capable driver and qemu were also needed. I just rebase the latest version of