[Kernel-packages] [Bug 1762652] Re: perf DWARF unwind failed
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 : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1762652] Re: perf DWARF unwind failed
** Tags added: artful -- 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: Incomplete 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 : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1762652] Re: perf DWARF unwind failed
Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem? Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.16 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.16 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- 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: Incomplete 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 : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1762652] Re: perf DWARF unwind failed
apport-collect crashes here, sorry. I'm using a German locale and KDE. Error: File "/usr/share/apport/apport-kde", line 359, in ui_update_view QTreeWidgetItem(keyitem, [str(line)]) UnicodeEncodeError: 'ascii' codec can't encode character u'\xfc' in position 87: ordinal not in range(128) ** 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 : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1762652] Re: perf DWARF unwind failed
** Package changed: ubuntu => linux (Ubuntu) -- 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: Incomplete 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 : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
