On Thu, Apr 10, 2025 at 01:17:45PM -0400, Steven Rostedt wrote: > Mark Brown <[email protected]> wrote:
> > We've been seeing the PID filters selftest failing for a while on > > several arm64 systems, a bisect I managed to run without running into > > any confounding issues pointed to this patch which is in mainline as > > ff5c9c576e75. It's in the ftrace code, but I'm not immediately seeing > > the relevance. Output from a failing run: > Hmm, I wonder if there's junk being added into the trace. > Can you add this patch, and show me the output when it fails again? # # + cat trace # # # tracer: function_graph # # # # # # CPU TASK/PID DURATION FUNCTION CALLS # # # | | | | | | | | | # # 0) ftracet-5190 | ! 537.633 us | kernel_clone(); /* ret=0x1470 */ # # # # 0) ftracet-5190 | ! 508.253 us | kernel_clone(); /* ret=0x1471 */ # # # # 0) ftracet-5190 | ! 215.716 us | kernel_clone(); /* ret=0x1476 */ # # # # 0) ftracet-5190 | ! 493.890 us | kernel_clone(); /* ret=0x147b */ # # # # + fail PID filtering not working? ... # # + cat trace # # # tracer: function_graph # # # # # # CPU TASK/PID DURATION FUNCTION CALLS # # # | | | | | | | | | # # 0) ftracet-12279 | ! 598.118 us | kernel_clone(); /* ret=0x301f */ # # # # 0) ftracet-12279 | ! 492.539 us | kernel_clone(); /* ret=0x3020 */ # # # # 0) ftracet-12279 | ! 231.104 us | kernel_clone(); /* ret=0x3025 */ # # # # 0) ftracet-12279 | ! 555.566 us | kernel_clone(); /* ret=0x302a */ # # # # + fail PID filtering not working?
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