device: 0.729 graphic: 0.702 socket: 0.553 semantic: 0.495 network: 0.490 files: 0.369 PID: 0.292 performance: 0.283 boot: 0.276 vnc: 0.253 debug: 0.249 other: 0.156 permissions: 0.154 KVM: 0.086 qemu-system crashes when use sheepdog driver Already solved. why this bug is Invalid? U can view my upload file and qemu/block/sheepdog.c differences. Sorry, but if I read a bug description that says "already solved", without any proper description how you ran qemu, which version you were using, etc., then the bug ticket does not make much sense. So please provide a proper description, and if you've already got a fix, send a patch (diff!) to the qemu-devel mailing list instead of attaching a .c file to the bug tracker. See http://wiki.qemu-project.org/Contribute/SubmitAPatch for details. Thanks. Have you ever sent a patch to the qemu-devel mailing list? [Expired for QEMU because there has been no activity for 60 days.]