linux-kernel - [bug?] LTP pt_test failing after 38bb8d77d0b9 "perf/x86/intel/pt: Split ToPA metadata and page layout"

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Date:   Sat, 19 Oct 2019 03:41:15 -0400 (EDT)
From:   Jan Stancek <jstancek@...hat.com>
To:     ammy.yi@...el.com, alexander.shishkin@...ux.intel.com
Cc:     linux-kernel@...r.kernel.org, LTP List <ltp@...ts.linux.it>,
        acme@...hat.com, jolsa@...hat.com, peterz@...radead.org,
        eranian@...gle.com, tglx@...utronix.de, vincent.weaver@...ne.edu,
        mingo@...nel.org, Jan Stancek <jstancek@...hat.com>
Subject: [bug?] LTP pt_test failing after 38bb8d77d0b9 "perf/x86/intel/pt:
 Split ToPA metadata and page layout"

Hi,

All variants of pt_test:
  https://github.com/linux-test-project/ltp/blob/master/testcases/kernel/tracing/pt_test/pt_test.c
started failing after:
  38bb8d77d0b9 ("perf/x86/intel/pt: Split ToPA metadata and page layout")

with following error on console/dmesg:
  pt: ToPA ERROR encountered, trying to recover

on Broadwell-EP:

vendor_id       : GenuineIntel
cpu family      : 6
model           : 79
model name      : Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz
stepping        : 1

Regards,
Jan