Re: [Qemu-devel] [RFC PATCH v2 0/3] separate thread for VM migration

2011-08-01 Thread shawn che
Hi , I am studying KVM, but I have a question to ask.I wish someone can spare time to help me. What does the file "Assigned-dev.c" use for? I add some printk in the funcitons in this file,but it seldom work. Is it used for VT-d or others? can you give me some suggestions? Thank you so much for y

[Qemu-devel] [RFC PATCH v2 0/3] separate thread for VM migration

2011-07-29 Thread Umesh Deshpande
Following patch deals with VCPU and iothread starvation during the migration of a guest. Currently the iothread is responsible for performing the guest migration. It holds qemu_mutex during the migration and doesn't allow VCPU to enter the qemu mode and delays its return to the guest. The guest mig