Launchpad has imported 2 comments from the remote bug at https://bugzilla.kernel.org/show_bug.cgi?id=214185.
If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at https://help.launchpad.net/InterBugTracking. ------------------------------------------------------------------------ On 2021-08-26T11:18:31+00:00 colin.king wrote: While running some kernel selftests I discovered that the kernel ftrace func_stack_tracer.tc fails. How to reproduce: in the 5.13 kernel source tree: $ cd linux/tools/testing/selftests/ftrace $ sudo ./ftracetest test.d/ftrace/func_stack_tracer.tc [1] ftrace - Max stack tracer [FAIL] # of passed: 0 # of failed: 1 # of unresolved: 0 # of untested: 0 # of unsupported: 0 # of xfailed: 0 # of undefined(test bug): 0 ... I've looked at this test and the following occurs: 0. go to the tracking directory: cd /sys/kernel/debug/tracing 1. tracer is disabled: echo 0 > /proc/sys/kernel/stack_tracer_enabled 2. tracer is set to track all kernel functions with *lock* in the name: echo '*lock*' > stack_trace_filter (this takes a few minutes to configure, it's quite slow). one can see the functions filtered on by using cat stack_trace_filter 3. emabling the tracer: echo 0 > stack_max_size echo 1 > /proc/sys/kernel/stack_tracer_enabled 4. check if the tracer has found any functions that match: cat stack_trace | grep lock ..none appear in position 0 in the stack_trace file. This works on other arches such as arm64, amd64, s390x etc.. so I'm not sure why it's not working on RISC-V. Reply at: https://bugs.launchpad.net/ubuntu-kernel- tests/+bug/1940972/comments/6 ------------------------------------------------------------------------ On 2021-08-26T11:20:43+00:00 colin.king wrote: Tested in RISC-V SiFive Unmatched dev board and QEMU. Reply at: https://bugs.launchpad.net/ubuntu-kernel- tests/+bug/1940972/comments/7 ** Changed in: linux Status: Unknown => Confirmed ** Changed in: linux Importance: Unknown => Medium -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-riscv in Ubuntu. https://bugs.launchpad.net/bugs/1940972 Title: v5.13 kernel ftrace selftest fails on riscv64 unmatched Status in Linux: Confirmed Status in ubuntu-kernel-tests: New Status in linux-riscv package in Ubuntu: New Bug description: $ sudo make -C tools/testing/selftests TARGETS=ftrace run_tests ... # [32] ftrace - Max stack tracer [FAIL] ... Testing using 5.13.0-1002.2 the full ftrace suite takes just over 2 hours on unmatched. To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1940972/+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
