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charset="iso-2022-jp" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM4PR11MB5994.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 09446e7d-e6e4-4426-ce85-08db2a0324bb X-MS-Exchange-CrossTenant-originalarrivaltime: 21 Mar 2023 11:55:19.2301 (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: NzCIijyGw346gvqakb8IsjWwerdnA82k3MxgqMnWJMzX/ejPu5z4J/GCNrVwfIUxT9q8f1EV0YJ5E1gOgjy2+A== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA3PR11MB7528 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 > -----Original Message----- > From: Ye, MingjinX > Sent: Tuesday, March 21, 2023 10:08 AM > To: Zhang, Qi Z ; dev@dpdk.org > Cc: Yang, Qiming ; stable@dpdk.org; Zhou, YidingX > ; Zhang, Ke1X > Subject: RE: [PATCH v5] net/ice: fix ice dcf control thread crash >=20 > Hi Qi, here is my new solution, can you give me some good suggestions. > 1. remove the 'vc_event_msg_cb =3D=3D NULL' related processing and let ea= ch > 'ice-rest' thread, end normally. > 2. Define vsi_update_thread_num as rte_atomic32_t. >=20 > > -----Original Message----- > > From: Zhang, Qi Z > > Sent: 2023=1B$BG/=1B(B3=1B$B7n=1B(B20=1B$BF|=1B(B 20:53 > > To: Ye, MingjinX ; dev@dpdk.org > > Cc: Yang, Qiming ; stable@dpdk.org; Zhou, > > YidingX ; Zhang, Ke1X > > Subject: RE: [PATCH v5] net/ice: fix ice dcf control thread crash >=20 > > > for (;;) { > > > + if (hw->vc_event_msg_cb =3D=3D NULL) > > > + break; > > Can you explain why this is required, seems it not related with your > > commit log > The purpose of this is to bring all 'ice-reset' threads to a quick end wh= en hw > is released. I don't understand, the vc_event_msg_cb was initialized in ice_dcf_dev_init= and never be reset why we need this check, anything I missed? >=20 > > > > > > - rte_intr_enable(pci_dev->intr_handle); > > > - ice_dcf_enable_irq0(hw); > > > + if (hw->vc_event_msg_cb !=3D NULL) { > > > + rte_intr_enable(pci_dev->intr_handle); > > > + ice_dcf_enable_irq0(hw); > > > > Same question as above > These are called when HW releases the resource. Therefore, there is no ne= ed > to call. >=20 > > > + rte_spinlock_lock(&dcf_hw->vsi_thread_lock); > > > + dcf_hw->vsi_update_thread_num++; > > > + rte_spinlock_unlock(&dcf_hw->vsi_thread_lock); > > > > I think you can define vsi_update_thread_num as rte_atomic32_t and use > > rte_atomic32_add/sub > At first I chose the rte_atomic32_t option, which is not very elegant usi= ng > spinlock. > The 'checkpatches.sh' script gives a warning ('Using rte_atomicNN_xxx') w= hen > it is executed. I saw the comment on line 89 of the script (# refrain fro= m new > additions of 16/32/64 bits rte_atomicNN_xxx()), so I went with the spinlo= ck > solution. You are right, rte_atomicNN_xxx will be deprecated, and should not be used We can use the gcc build-in function __atomic_fetch_add/sub as an alternati= ve, sp >=20 >=20