Re: [PATCH] perf tools: Fix bug for perf kvm report without guestmount.

Arnaldo Carvalho de Melo
2013-12-09T18:49:08Z

Em Mon, Dec 09, 2013 at 11:08:05AM -0700, David Ahern escreveu:
> On 12/9/13, 11:07 AM, Arnaldo Carvalho de Melo wrote:
> >Em Sun, Dec 08, 2013 at 10:39:36AM -0700, David Ahern escreveu:
> >>On 12/6/13, 4:56 AM, Arnaldo Carvalho de Melo wrote:
> >>>You get correct results because the modules/kallsyms info you provided
> >>>matches the VM you're testing, i.e. the pid test is not needed.
> >>>
> >>>I think we need to specify for which PID the --guestmodules and
> >>>--guestkallsyms is provided, so that it can refuse to use it for pids
> >>>where it is invalid.
> >>
> >>Those are arguments are shortcut defaults for guests. If the VMs are
> >>not running the same kernel use guestmount and pid specific
> >>directories. e.g.,
> >>
> >>/tmp/guestmount/<pid>/proc/kallsyms
> >
> >Does this already works like that? /me tries to figure that out...
>
> yes.
>

Yeah, I saw that:

if ((pid != HOST_KERNEL_ID) &&
(pid != DEFAULT_GUEST_KERNEL_ID) &&
(symbol_conf.guestmount)) {
sprintf(path, "%s/%d", symbol_conf.guestmount, pid);

So, in summary, ack/nack this patch?

- Arnaldo