Re: perf: record segfaults for cycles event when collecting data on a VM

David Ahern
2012-02-09T15:47:30Z

On 02/09/2012 08:28 AM, Joerg Roedel wrote:
> On Thu, Feb 09, 2012 at 03:32:53PM +0100, Joerg Roedel wrote:
>> Yeah, right. Guest samples may also show up intentionally when the event
>> modifiers are used. So crashing on machine==NULL needs to be fixed.
>
> Hmm, on the other hand, there is no way to specify guest symbol
> information to the regular perf subcommands except for perf-kvm. Without
> that information perf can not resolve any GUEST_KERNEL samples, so in
> the end there is no point in setting perf_guest to true except for
> perf-kvm, no?

Exactly. That was my point in my last reply.