I'm attaching thee patches that went upstream as part of a larger bundle to fix this kexec issue.
>From "K. Y. Srinivasan" <> Subject [PATCH V2 00/10] Drivers: hv: vmbus: Enable kexec and other misc cleanup Date Thu, 4 Jun 2015 16:25:39 -0700 In addition to enabling kexec, this patch-set has a bunch of miscellaneous fixes. In this version of the patch-set; I have fixed up the subject line for couple of patches (Greg) Alex Ng (1): Drivers: hv: balloon: Enable dynamic memory protocol negotiation with Windows 10 hosts K. Y. Srinivasan (1): Drivers: hv: vmbus: Permit sending of packets without payload Vitaly Kuznetsov (8): cpu-hotplug: export cpu_hotplug_enable/cpu_hotplug_disable Drivers: hv: vmbus: use cpu_hotplug_enable/disable Drivers: hv: vmbus: remove hv_synic_free_cpu() call from hv_synic_cleanup() Drivers: hv: vmbus: add special kexec handler Drivers: hv: don't do hypercalls when hypercall_page is NULL Drivers: hv: vmbus: use 'die' notification chain instead of 'panic' Drivers: hv: kvp: check kzalloc return value Drivers: hv: fcopy: dynamically allocate smsg_out in fcopy_send_data() Documentation/power/suspend-and-cpuhotplug.txt | 6 +- arch/x86/include/asm/mshyperv.h | 2 + arch/x86/kernel/cpu/mshyperv.c | 30 +++++++++ drivers/hv/channel.c | 4 +- drivers/hv/hv.c | 15 +++-- drivers/hv/hv_balloon.c | 26 ++++++-- drivers/hv/hv_fcopy.c | 21 ++++--- drivers/hv/hv_kvp.c | 3 + drivers/hv/vmbus_drv.c | 76 +++++++++--------------- kernel/cpu.c | 13 +++-- 10 files changed, 119 insertions(+), 77 deletions(-) -- 1.7.4.1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1440103 Title: [Hyper-V] Kernel panic not functional on Vivid To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1440103/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs