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X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: Xx1LgLenppL1r5EGOQ9gZDV17JSafFCO4D6YxnmtghqLepNTMw9bDea6kBup4rUBQCEICAE8mspqNE+Ids6pag51DkWcS+oCiaVPhXVBuHo= X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW6PR11MB8337 X-OriginatorOrg: intel.com X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Archive: List-Post: List-Help: List-Subscribe: , X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_NONE,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 > A window entry is a contended device_trylock(), that is, the exact > moment really_probe() holds the auxiliary device lock and waits for the > RTNL lock, so each one is an occasion that used to close the cycle. > Without the series the console shows both halves and the box only > returns through hung_task_panic. 25 reboots on the patched kernel were > clean. > > Petr Oros (3): > ice: avoid RTNL deadlock when notifying the RDMA auxiliary driver > ice: do not block on the aux device lock in ethtool set_channels > ice: do not block on the aux device lock in ndo_setup_tc > > drivers/net/ethernet/intel/ice/ice_dcb_lib.c | 9 +++++++- > drivers/net/ethernet/intel/ice/ice_ethtool.c | 6 +++++- > drivers/net/ethernet/intel/ice/ice_idc.c | 20 ++++++++++++++---- > drivers/net/ethernet/intel/ice/ice_idc_int.h | 2 +- > drivers/net/ethernet/intel/ice/ice_main.c | 22 +++++++++++++++----- > 5 files changed, 47 insertions(+), 12 deletions(-) > trylock is clearly an antipattern, but we don't have anything better, especially for a -net material side note: we have resolved the same issue via rtnl_unlock()&relock() in OOT (to be published within days), which is even worse anti-pattern Would be best to have proper API as -next thing, glad to hear your support on that! side note2: I have a few fixes around the thing you touches, but no conflicts so far, will CC you