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| author |   Tianyu Lan <Tianyu.Lan@microsoft.com> | 2020-04-06 08:53:28 -0700 |
|---|---|---|
| committer |   Wei Liu <wei.liu@kernel.org> | 2020-04-11 17:18:22 +0100 |
| commit | 73f26e526f19afb3a06b76b970a76bcac2cafd05 (patch) | |
| tree | 3768bb3bf6debd7f89fcaf68eb15744f20f83c1c /init | |
| parent | x86/Hyper-V: Free hv_panic_page when fail to register kmsg dump (diff) | |
| download | linux-dev-73f26e526f19afb3a06b76b970a76bcac2cafd05.tar.xz linux-dev-73f26e526f19afb3a06b76b970a76bcac2cafd05.zip | |
x86/Hyper-V: Trigger crash enlightenment only once during system crash.
When a guest VM panics, Hyper-V should be notified only once via the
crash synthetic MSRs. Current Linux code might write these crash MSRs
twice during a system panic:
1) hyperv_panic/die_event() calling hyperv_report_panic()
2) hv_kmsg_dump() calling hyperv_report_panic_msg()
Fix this by not calling hyperv_report_panic() if a kmsg dump has been
successfully registered. The notification will happen later via
hyperv_report_panic_msg().
Fixes: 7ed4325a44ea ("Drivers: hv: vmbus: Make panic reporting to be more useful")
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
Link: https://lore.kernel.org/r/20200406155331.2105-4-Tianyu.Lan@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'init')
0 files changed, 0 insertions, 0 deletions