Comment 5 for bug 1762652

Well this is more about the user space tool perf, not really the kernel itself. And I can't really imagine why DWARF unwinding would have anything to do with the kernel used. I'm on stock ubuntu 4.13.0-38-generic btw.

When I compile perf from the kernel source (commit 2bf1ab321a06a7faeb95c56d02139140fb56199a) it seems that it fails when only having libdw-dwarf-unwind as system feature. When having both libdw-dwarf-unwind and libunwind available the compiled perf does not fail the test. I think that for DWARF unwinding either one of those two libraries should be enough, so maybe this is a bug in libdwarf or how perf uses libdwarf, and when libunwind is available it uses it instead. But just a wild guess, I don't really know what's going on.

In any case, a quick "fix" seems to be building perf with libunwind - even if that just masks the actual bug here.