I was able to backport the two patches to Trusty. It required quite a few prerequisite commits. The following commits were backported to a Trusty test kernel:
f9cc88d lp1470250: patch from faulpeltz 6f3e8a2 Drivers: hv: utils: Continue to poll VSS channel after handling requests. 725a85d Drivers: hv: utils: fix a race on userspace daemons registration a0c12c6 Drivers: hv: kvp: fix IP Failover 51fea7d Drivers: hv: utils: Invoke the poll function after handshake 42fb309 Drivers: hv: utils: run polling callback always in interrupt context 505de58 Drivers: hv: fcopy: full handshake support 2ec9789 Drivers: hv: vss: full handshake support e12c519 Tools: hv: vss: use misc char device to communicate with kernel 1f3abc0 Drivers: hv: kvp: convert to hv_utils_transport d789589 Drivers: hv: fcopy: convert to hv_utils_transport 51ed5da Drivers: hv: vss: convert to hv_utils_transport edbff5d Drivers: hv: util: introduce hv_utils_transport abstraction 056fbb5 Drivers: hv: fcopy: switch to using the hvutil_device_state state machine 5eb0af4 Drivers: hv: vss: switch to using the hvutil_device_state state machine a170e78 Drivers: hv: kvp: switch to using the hvutil_device_state state machine a539598 Drivers: hv: fcopy: rename fcopy_work -> fcopy_timeout_work 7894b35 Drivers: hv: kvp: rename kvp_work -> kvp_timeout_work d3fc031 Drivers: hv: kvp,vss: Fast propagation of userspace communication failure ee85362 Drivers: hv: vss: Introduce timeout for communication with userspace d714c5a Tools: hv: vssdaemon: ignore the EBUSY on multiple freezing the same partition b957545 connector: add portid to unicast in addition to broadcasting The test kernel can be downloaded from: http://kernel.ubuntu.com/~jsalisbury/lp1470250/AlexFaulpeltzPatch/trusty/ Can this kernel be tested to see if it resolves this bug? Note, that both the linux-image and linux-image-extra .deb packages need to be installed. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1470250 Title: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
