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Subject[PATCH 0/4] x86/Hyper-V: Panic code path fixes
From: Tianyu Lan <>

This patchset fixes some issues in the Hyper-V panic code path.
Patch 1 resolves issue that panic system still responses network
Patch 2-3 resolves crash enlightenment issues.
Patch 4 is to set crash_kexec_post_notifiers to true for Hyper-V
VM in order to report crash data or kmsg to host before running
kdump kernel.

Tianyu Lan (4):
x86/Hyper-V: Unload vmbus channel in hv panic callback
x86/Hyper-V: Free hv_panic_page when fail to register kmsg dump
x86/Hyper-V: Trigger crash enlightenment only once during system
x86/Hyper-V: Report crash register data or ksmg before running crash

arch/x86/kernel/cpu/mshyperv.c | 10 ++++++++++
drivers/hv/channel_mgmt.c | 5 +++++
drivers/hv/vmbus_drv.c | 35 +++++++++++++++++++++++++----------
3 files changed, 40 insertions(+), 10 deletions(-)


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