Messages in this thread | | | Subject | Re: [PATCH/RFC 2/2] perf tools: Check callchain is corrupted | From | Namhyung Kim <> | Date | Thu, 31 May 2012 23:04:37 +0900 |
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Hi,
2012-05-31 (목), 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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