Re: INFO: task hung in vhost_net_stop_vq

2019-04-08 Thread Jason Wang
On 2019/3/26 下午6:28, Dmitry Vyukov wrote: On Tue, Mar 26, 2019 at 11:17 AM Jason Wang wrote: On 2019/3/25 下午10:02, Michael S. Tsirkin wrote: Looks like more iotlb locking mess? Looking at the calltrace: [ 221.743675] = [ 221.744297] [ INFO: poss

Re: INFO: task hung in vhost_net_stop_vq

2019-03-26 Thread Dmitry Vyukov via Virtualization
On Tue, Mar 26, 2019 at 11:17 AM Jason Wang wrote: > > > On 2019/3/25 下午10:02, Michael S. Tsirkin wrote: > > Looks like more iotlb locking mess? > > > Looking at the calltrace: > > [ 221.743675] = > [ 221.744297] [ INFO: possible recursive locking dete

Re: INFO: task hung in vhost_net_stop_vq

2019-03-26 Thread Jason Wang
On 2019/3/25 下午10:02, Michael S. Tsirkin wrote: Looks like more iotlb locking mess? Looking at the calltrace: [ 221.743675] = [ 221.744297] [ INFO: possible recursive locking detected ] [ 221.744944] 4.7.0+ #1 Not tainted [ 221.745326]

Re: INFO: task hung in vhost_net_stop_vq

2019-03-25 Thread Michael S. Tsirkin
Looks like more iotlb locking mess? On Tue, Mar 19, 2019 at 10:21:00PM -0700, syzbot wrote: > syzbot has bisected this bug to: > > commit 6b1e6cc7855b09a0a9bfa1d9f30172ba366f161c > Author: Jason Wang > Date: Thu Jun 23 06:04:32 2016 + > > vhost: new device IOTLB API > > bisection log