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. ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1762652 Title: perf DWARF unwind failed Status in linux package in Ubuntu: Confirmed Bug description: Ubuntu 17.10. To reproduce: $ perf test [...] 57: DWARF unwind : FAILED! [...] It seems perf is somehow mis-configured. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1762652/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : firstname.lastname@example.org Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp