diff options
| author |   Vitaly Kuznetsov <vkuznets@redhat.com> | 2015-08-01 16:08:09 -0700 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-08-04 22:28:38 -0700 |
| commit | b4370df2b1f5158de028e167974263c5757b34a6 (patch) | |
| tree | 4a8733a8b1ae446e1b1a3df70f7c180f8bc15ecf /arch/x86/include/asm/mshyperv.h | |
| parent | Drivers: hv: don't do hypercalls when hypercall_page is NULL (diff) | |
| download | linux-dev-b4370df2b1f5158de028e167974263c5757b34a6.tar.xz linux-dev-b4370df2b1f5158de028e167974263c5757b34a6.zip | |
Drivers: hv: vmbus: add special crash handler
Full kernel hang is observed when kdump kernel starts after a crash. This
hang happens in vmbus_negotiate_version() function on
wait_for_completion() as Hyper-V host (Win2012R2 in my testing) never
responds to CHANNELMSG_INITIATE_CONTACT as it thinks the connection is
already established. We need to perform some mandatory minimalistic
cleanup before we start new kernel.
Reported-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/x86/include/asm/mshyperv.h')
| -rw-r--r-- | arch/x86/include/asm/mshyperv.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h index d3db9108346b..d02f9c9a6592 100644 --- a/arch/x86/include/asm/mshyperv.h +++ b/arch/x86/include/asm/mshyperv.h @@ -22,4 +22,6 @@ void hv_remove_vmbus_irq(void); void hv_setup_kexec_handler(void (*handler)(void)); void hv_remove_kexec_handler(void); +void hv_setup_crash_handler(void (*handler)(struct pt_regs *regs)); +void hv_remove_crash_handler(void); #endif |