On Fri, May 18, 2018 at 07:09:10PM +0000, Sunil Muthuswamy wrote: > In the VM mode on Hyper-V, currently, when the kernel panics, an error > code and few register values are populated in an MSR and the Hypervisor > notified. This information is collected on the host. The amount of > information currently collected is found to be limited and not very > actionable. To gather more actionable data, such as stack trace, the > proposal is to write one page worth of kmsg data on an allocated page > and the Hypervisor notified of the page address through the MSR. > > - Added a sysctl option to control the behavior, with ON by default. > > CC: kys@xxxxxxxxxxxxx > CC: sthemmin@xxxxxxxxxxxxx > Signed-off-by: Sunil Muthuswamy <sunilmut@xxxxxxxxxxxxx> > --- > arch/x86/hyperv/hv_init.c | 35 ++++++++++ > arch/x86/include/asm/hyperv-tlfs.h | 5 +- > arch/x86/include/asm/mshyperv.h | 1 + > drivers/hv/vmbus_drv.c | 128 +++++++++++++++++++++++++++++++++++++ > 4 files changed, 167 insertions(+), 2 deletions(-) What changed from v1? Always put that below the --- line as the documentation says to. thanks, greg k-h _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
