On 4/11/22 07:44, zhangfei....@foxmail.com wrote: > On 2022/4/11 下午10:36, Dave Hansen wrote: >> On 4/11/22 07:20, zhangfei....@foxmail.com wrote: >>>> Is there nothing before this call trace? Usually there will be at least >>>> some warning text. >>> I added dump_stack() in ioasid_free. >> Hold on a sec, though... >> >> What's the *problem* here? Did something break or are you just saying >> that something looks weird to _you_? > > After this, nginx is not working at all, and hardware reports error. > Suppose the the master use the ioasid for init, but got freed. > > hardware reports: > [ 152.731869] hisi_sec2 0000:76:00.0: qm_acc_do_task_timeout [error > status=0x20] found > [ 152.739657] hisi_sec2 0000:76:00.0: qm_acc_wb_not_ready_timeout [error > status=0x40] found > [ 152.747877] hisi_sec2 0000:76:00.0: sec_fsm_hbeat_rint [error status=0x20] > found > [ 152.755340] hisi_sec2 0000:76:00.0: Controller resetting... > [ 152.762044] hisi_sec2 0000:76:00.0: QM mailbox operation timeout! > [ 152.768198] hisi_sec2 0000:76:00.0: Failed to dump sqc! > [ 152.773490] hisi_sec2 0000:76:00.0: Failed to drain out data for stopping! > [ 152.781426] hisi_sec2 0000:76:00.0: QM mailbox is busy to start! > [ 152.787468] hisi_sec2 0000:76:00.0: Failed to dump sqc! > [ 152.792753] hisi_sec2 0000:76:00.0: Failed to drain out data for stopping! > [ 152.800685] hisi_sec2 0000:76:00.0: QM mailbox is busy to start! > [ 152.806730] hisi_sec2 0000:76:00.0: Failed to dump sqc! > [ 152.812017] hisi_sec2 0000:76:00.0: Failed to drain out data for stopping! > [ 152.819946] hisi_sec2 0000:76:00.0: QM mailbox is busy to start! > [ 152.825992] hisi_sec2 0000:76:00.0: Failed to dump sqc!
That would have been awfully handy information to have in an initial bug report. :) Is there a chance you could dump out that ioasid alloc *and* free information in ioasid_alloc/free()? This could be some kind of problem with the allocator, or with copying the ioasid at fork. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
