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Diffstat (limited to 'mailinglist/output_launchpad/1586613')
| -rw-r--r-- | mailinglist/output_launchpad/1586613 | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/mailinglist/output_launchpad/1586613 b/mailinglist/output_launchpad/1586613 new file mode 100644 index 00000000..44e4b617 --- /dev/null +++ b/mailinglist/output_launchpad/1586613 @@ -0,0 +1,14 @@ +usb-hub can not be detached when detach usbdevice VM + +I give a host usb device to guest in the way of passthrough,use "virsh attach-device" cmd. In guest os,use "lsusb" cmd I can see two devices have been added,one is usb device and the other is usb-hub（0409:55aa NEC Corp. Hub）. +when I use "virsh detach-device" detach the usb device,in guest os the usb-hub was still exists. +It can create a bad impression when operating the VM,for example,suspend and resume the VM,qemu would report that: + +2016-05-24T12:03:54.434369Z qemu-kvm: Unknown savevm section or instance '0000:00:01.2/2/usb-hub' 0 + +2016-05-24T12:03:54.434742Z qemu-kvm: load of migration failed: Invalid argument + +From qemu's code,it can be sure that the usb-hub is generated by qemu,and the process of detaching usb-hub has already been executed,but failed.With adding print information,error as follows: +libusbx: error [do_close] Device handle closed while transfer was still being processed, but the device is still connected as far as we know +libusbx: warning [do_close] A cancellation for an in-flight transfer hasn't completed but closing the device handle + |