Re: [PATCH 1/3] perf, tool: Force guest machine definition option

[David Ahern]

On 4/13/12 5:32 AM, Jiri Olsa wrote:
> > Even with guestmount specified you can hit this path -- e.g., no
> > pid-based directory under guestmount for a VM.
>
> hm, something's wrong anyway..
>
> [root@dhcp-26-214 perf]# ./perf kvm --guest --guestkallsyms=./kallsyms record -p 1791
> ^C[ perf record: Woken up 1 times to write data ]
> [ perf record: Captured and wrote 0.013 MB perf.data.guest (~576 samples) ]
> [root@dhcp-26-214 perf]# ./perf kvm --guest --guestkallsyms=./kallsyms report --stdio
> Segmentation fault (core dumped)
>
> it segfaults on guest mmap (attached bt) having NULL machine,
> since no guest kernel buildid/dso was stored&loaded..
> the host/guest machines code seems too 'complex' ;)

That was fixed on Monday I believe. Patch is in Arnaldo's urgent queue.


David
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