linux-kernel - [PATCH V4 0/6] x86/Hyper-V: Panic code path fixes

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Message-Id: <20200406155331.2105-1-Tianyu.Lan@microsoft.com>
Date:   Mon,  6 Apr 2020 08:53:25 -0700
From:   ltykernel@...il.com
To:     kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com,
        liuwe@...rosoft.com, tglx@...utronix.de, mingo@...hat.com,
        bp@...en8.de, hpa@...or.com, x86@...nel.org, arnd@...db.de,
        michael.h.kelley@...rosoft.com
Cc:     Tianyu Lan <Tianyu.Lan@...rosoft.com>, linux-arch@...r.kernel.org,
        linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org,
        vkuznets@...hat.com
Subject: [PATCH V4 0/6] x86/Hyper-V: Panic code path fixes

From: Tianyu Lan <Tianyu.Lan@...rosoft.com>

This patchset fixes some issues in the Hyper-V panic code path.
Patch 1 resolves issue that panic system still responses network
packets.
Patch 2-3,5-6 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 (6):
  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
    0;136;0c0;136;0c system crash.
  x86/Hyper-V: Report crash register data or kmsg before  running crash
    kernel
  x86/Hyper-V: Report crash register data when sysctl_record_panic_msg
    is not set
  x86/Hyper-V: Report crash data in die() when panic_on_oops is set

 arch/x86/hyperv/hv_init.c      |  6 +++-
 arch/x86/kernel/cpu/mshyperv.c | 10 +++++++
 drivers/hv/channel_mgmt.c      |  3 ++
 drivers/hv/vmbus_drv.c         | 62 ++++++++++++++++++++++++++++++------------
 include/asm-generic/mshyperv.h |  2 +-
 5 files changed, 63 insertions(+), 20 deletions(-)

-- 
2.14.5