Re: [PATCH] perf: do not flush maps on COMM for perf report

[Arnaldo Carvalho de Melo]

Em Wed, Aug 22, 2012 at 10:56:13AM -0600, David Ahern escreveu:
> On 8/22/12 10:29 AM, Arnaldo Carvalho de Melo wrote:
> >Adding the EXEC event, ditto. And I agree that while adding it we want
> >to do 1/2 as pre-requisite.
> 
> maps should not be flushed on a COMM event, so that was a mistake.
> Given that what new information does an EXEC event provide? Same
> process id. A COMM event is generated on an exec, so the name change
> happens. Mappings are dropped prior to that - and there is no unmap
> event. That seems to be a missing piece. Maps are added which is
> handled by MMAP events. After that why is an exec event relevant?

Please read the original discussion about it:

https://lkml.org/lkml/2012/2/13/545

- Arnaldo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/