Re: [PATCH/RFC 2/2] perf tools: Check callchain is corrupted

[Namhyung Kim]

Hi,

2012-05-31 (ë), 10:45 -0300, Arnaldo Carvalho de Melo:
> Em Thu, May 31, 2012 at 02:43:27PM +0900, Namhyung Kim escreveu:
> > We faced segmentation fault on perf top -G at very high sampling
> > rate due to a corrupted callchain. While the root cause was not
> > revealed (I failed to figure it out), this patch tries to protect
> > us from the segfault on such cases.
> 
> Capping the callchain lenght may even be a feature, not a consistency
> check, but I don't know how long, for consistency checking, we should
> consider too much, as there are cases of loooong callchains.
> 

Maybe we should consider applying (a part of, at least) Arun's multiple
stack patchset. Also note that Linus complained about the current stack
depth (255) is too long.

  https://lkml.org/lkml/2012/4/20/497


-- 
Regards,
Namhyung Kim


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