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--></style></head><body lang=ZH-TW link="#467886" vlink="#96607D" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>Hi all,</span><span lang=EN-US style='letter-spacing:.1pt;background:white;mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='letter-spacing:.1pt;background:white;mso-ligatures:none'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>Gerrit change for context:</span><span lang=EN-US style='letter-spacing:.1pt;background:white;mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'><a href="https://gerrit.openbmc.org/c/openbmc/openbmc/+/83946">https://gerrit.openbmc.org/c/openbmc/openbmc/+/83946</a></span><span lang=EN-US style='letter-spacing:.1pt;background:white;mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='letter-spacing:.1pt;background:white;mso-ligatures:none'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>Problem:</span><span lang=EN-US style='letter-spacing:.1pt;background:white;mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>When xyz.openbmc_project.ObjectMapper stops (cleanly or due to failure), the BMC may continue operating while the mapper is absent or reinitializing, leading to inconsistent states across services that rely on D-Bus path resolution.</span><span lang=EN-US style='letter-spacing:.1pt;background:white;mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='letter-spacing:.1pt;background:white;mso-ligatures:none'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>Examples observed:</span><span lang=EN-US style='letter-spacing:.1pt;background:white;mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>- pldmd: GetSubtree may temporarily miss MCTP EIDs, leading to removal of sensor objects and stopping sensor polling.</span><span lang=EN-US style='letter-spacing:.1pt;background:white;mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>- phosphor-state-manager: may fail to retrieve the correct PowerRestorePolicy during system discovery, preventing host power-on.</span><span lang=EN-US style='letter-spacing:.1pt;background:white;mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='letter-spacing:.1pt;background:white;mso-ligatures:none'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>Proposal:</span><span lang=EN-US style='letter-spacing:.1pt;background:white;mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>Adopt a default policy to:</span><span lang=EN-US style='letter-spacing:.1pt;background:white;mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>- Reboot the BMC whenever ObjectMapper stops or hits the start-rate limit.</span><span lang=EN-US style='letter-spacing:.1pt;background:white;mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>- Refuse manual stop/restart to avoid operating without the mapper.</span><span lang=EN-US style='letter-spacing:.1pt;background:white;mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='letter-spacing:.1pt;background:white;mso-ligatures:none'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>This can be expressed via a systemd drop-in:</span><span lang=EN-US style='mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>[Unit]</span><span lang=EN-US style='mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>SuccessAction=reboot</span><span lang=EN-US style='mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>FailureAction=reboot</span><span lang=EN-US style='mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>StartLimitAction=reboot</span><span lang=EN-US style='mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>RefuseManualStop=yes</span><span lang=EN-US style='mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='mso-ligatures:none'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>Questions for the community:</span><span lang=EN-US style='mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>- Placement: Should this live as a default in phosphor-objmgr, or be a policy in meta-phosphor?</span><span lang=EN-US style='mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>- Stop prevention: Is RefuseManualStop acceptable?</span><span lang=EN-US style='mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>- Safeguards: Any concerns about reboot loops if ObjectMapper cannot start?</span><span lang=EN-US style='mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>- Reboot reason visibility: Should we emit an event log indicating that the BMC rebooted due to ObjectMapper stopping?</span><span lang=EN-US style='mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'><br><br></span><span lang=EN-US style='mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>Thanks,</span><span lang=EN-US style='mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:black;letter-spacing:.1pt;background:white;mso-ligatures:none'>Eric Yang</span><span lang=EN-US style='mso-ligatures:none'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></body></html>