You have been subscribed to a public bug: == Comment: #0 - Vaibhav Jain - 2018-04-09 05:20:18 == ---Problem Description--- Presently the Trace Data on the PSL is lost when it encounters a PERST signal. This is usually a major inconvenience during EEH debugging as PSL traces are needed to investigate the EEH cause. To fix this we enable the NORST bit by default for debug afu images to prevent reset of AFU trace-data on a PCI link drop. For production AFU images this bit is always ignored and PSL gets reconfigured anyways thereby resetting the trace data. So setting this bit for non-debug images doesn't have any impact.
Fix for this issue was merged to mainline kernel via commit: 03ebb419b896 cxl: Enable NORST bit in PSL_DEBUG register for PSL9 ---Additional Hardware Info--- Flash GT+ adapter with 180323P1 Image Machine Type = Boston-LC ---Steps to Reproduce--- 1. Enable traces on the card with psl_trace_dump tool. 2. Inject an EEH. 3. Try to dump the traces from PSL via psl_trace_dump. ---uname output--- 4.15.0-12-generic ---Debugger--- A debugger is not configured System Dump Info: The system is not configured to capture a system dump. Stack trace output: no Oops output: no ** Affects: linux (Ubuntu) Importance: Undecided Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) Status: New ** Tags: architecture-ppc64le bugnameltc-166542 severity-high targetmilestone-inin1804 -- PSL traces reset after PERST for debug AFU image https://bugs.launchpad.net/bugs/1762462 You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. -- Mailing list: https://launchpad.net/~kernel-packages Post to : email@example.com Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp