On Wed, 11 May 2022 10:22:59 +0800 Jason Wang <jasowang@xxxxxxxxxx> wrote: > > CPU0 > > ---- > > lock(&vcdev->irq_lock); > > <Interrupt> > > lock(&vcdev->irq_lock); > > > > *** DEADLOCK *** > > It looks to me we need to use write_lock_irq()/write_unlock_irq() to > do the synchronization. > > And we probably need to keep the > read_lock_irqsave()/read_lock_irqrestore() logic since I can see the > virtio_ccw_int_handler() to be called from process context (e.g from > the io_subchannel_quiesce()). > Sounds correct. Regards, Halil _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
