Re: kvmmmu tracing

Steven Rostedt
2009-11-23T14:59:20Z

On Mon, 2009-11-23 at 12:06 +0100, Johannes Berg wrote:
> Commit f691fe1da7e2715137d21ae5a80bec64db4625db is really broken wrt.
> the userspace interface for tracing because of the weird
> KVM_MMU_PAGE_PRINTK macro.
>
> Maybe we should have a "unsafe for export" flag for events, if they do
> strange things like that?
>
> As it stands, I can't use trace-cmd on an x86 machine that has kvm
> enabled because it will try to read all the kvm stuff. Arguably, it
> should only try to parse it when it needs it (i.e. not for me) but still
> it's very inconvenient to export something to userspace that it cannot
> possibly understand.

Note, I updated trace-cmd. I still does not read this macro nicely, but
it at least does not fail anymore.

-- Steve