Re: [Qemu-devel] [PATCH uq/master v2 0/2] Add some tracepoints for clarification of the cause of troubles

[Stefan Hajnoczi]

On Fri, Mar 29, 2013 at 01:24:25PM +0900, Kazuya Saito wrote:
> This series adds tracepoints for helping us clarify the cause of
> troubles. Virtualization on Linux is composed of some components such
> as qemu, kvm, libvirt, and so on. So it is very important to clarify
> firstly and swiftly the cause of troubles is on what component of
> them. Although qemu has useful information of this because it stands
> among kvm, libvirt and guest, it doesn't output the information by
> trace or log system.
> These patches add tracepoints which lead to reduce the time of the
> clarification. We'd like to add the tracepoints as the first set
> because, based on our experience, we've found out they must be useful
> for an investigation in the future. Without those tracepoints,
> we had a really hard time investigating a problem since the problem's
> reproducibility was quite low and there was no clue in the dump of
> qemu.
> 
> Changes from v1:
> Add arg to kvm_ioctl, kvm_vm_ioctl, kvm_vcpu_ioctl tracepoints.
> Add cpu_index to kvm_vcpu_ioctl, kvm_run_exit tracepoints.
> 
> Kazuya Saito (2):
>   kvm-all: add kvm_ioctl, kvm_vm_ioctl, kvm_vcpu_ioctl tracepoints
>   kvm-all: add kvm_run_exit tracepoint
> 
>  kvm-all.c    |    5 +++++
>  trace-events |    7 +++++++
>  2 files changed, 12 insertions(+), 0 deletions(-)
> 
> 
> 

Thanks, applied to my tracing tree:
https://github.com/stefanha/qemu/commits/tracing

Stefan