On 06/08/2017 03:08 PM, Steven Rostedt wrote: > On Thu, 8 Jun 2017 14:06:23 -0600 > Shuah Khan <[email protected]> wrote: > >>>>>>> # of passed: 41 >>>>>>> # of failed: 1 >>>>>>> # of unresolved: 0 >>>>>>> # of untested: 0 >>>>>>> # of unsupported: 3 >>>>>>> # of xfailed: 0 >>>>>>> # of undefined(test bug): 0 >>> >>> I booted v4.12-rc4 with your config (didn't even have to change >>> anything for my box), and checkout the v4.12-rc4 kernel on the test box >>> and ran ftracetest. Here's my result: >>> >>> # of passed: 40 >>> # of failed: 0 >>> # of unresolved: 0 >>> # of untested: 0 >>> # of unsupported: 6 >>> # of xfailed: 0 >>> # of undefined(test bug): 0 >>> >>> The unsupported were: >>> >>> [29] event trigger - test histogram modifiers [UNSUPPORTED] >>> [30] event trigger - test histogram trigger [UNSUPPORTED] >>> [31] event trigger - test multiple histogram triggers [UNSUPPORTED] >>> >>> [44] (instance) event trigger - test histogram modifiers [UNSUPPORTED] >>> [45] (instance) event trigger - test histogram trigger [UNSUPPORTED] >>> [46] (instance) event trigger - test multiple histogram triggers >>> [UNSUPPORTED] >>> >>> Now why is this different? What compiler are you using to build your >>> kernel? >>> >> gcc version 6.3.0 20170406 (Ubuntu 6.3.0-12ubuntu2) >> >> >> I don't see any regressions. I use this system for stable release testing >> and haven't seen any issues. Does ftrace have a dependency on a specific >> gcc revision? > > It behaves differently with different gcc, as some support mfentry, > while others only use mcount. gcc 6.3.0 should be using mfentry. I'm > testing with 6.2, a build I made myself. > > Just to confirm, you are running the 4.12-rc4 ftracetests on a 4.12-rc4 > kernel and getting this error? Or are you running a different version > of ftracetest or a different version of the kernel? >
I am running 4.12-rc4 ftracetests on a 4.12-rc4 kernel. I did a headers install before I built and ran kselftest. btw tests should run on older kernels failing gracefully when feature isn't supported and/or enabled. So the expectation is for ftracetest to run cleanly skipping tests on older kernels. Would getting results for ftracetest on 4.11 with 4.11 ftracetest help you with debug? thanks, -- Shuah
