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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: IA1PR11MB6418.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 55a05462-9bda-4065-5faf-08da7b06a933 X-MS-Exchange-CrossTenant-originalarrivaltime: 10 Aug 2022 19:29:36.4458 (UTC) 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: Cit5XZBhPLkDAxhc2jZEPhM1m1EAx9wwXAReS0FupyXrrgrpoZFHf3574lxPKWJL2gsUouzZOp27QOzqoEmmfJKENDltT4j7+px3W9+RTr4= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR11MB1577 X-OriginatorOrg: intel.com X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org Hi Harish, > -----Original Message----- > From: Naga Harish K, S V > Sent: Wednesday, August 10, 2022 2:10 AM > To: Carrillo, Erik G > Cc: dev@dpdk.org; stable@dpdk.org > Subject: [PATCH v2 3/4] timer: fix function to stop all timers >=20 > There is a possibility of deadlock in this API, as same spinlock is tried= to be > acquired in nested manner. >=20 > In timer_del function, if the previous owner and current owner lcore are It might be clearer to say something like: "If the lcore that is stopping the timer is different from the lcore that = owns the timer, the timer list lock is acquired in timer_del(), even if loc= al_is_locked is true. Because the same lock was already acquired in rte_ti= mer_stop_all(), the thread will hang." =20 Thanks, Erik > different, the lock is tried to be acquired even though the same lock is > already acquired by the caller of timer_del function. >=20 > This patch removes the acquisition of nested locking. >=20 > Fixes: 821c51267bcd63a ("timer: add function to stop all timers in a list= ") > Cc: stable@dpdk.org >=20 > Signed-off-by: Naga Harish K S V > ---