On 23.07.2024 3:38 PM, Marc Gonzalez wrote: > On 23/07/2024 15:08, Konrad Dybcio wrote: > >> On 23.07.2024 2:57 PM, Marc Gonzalez wrote: >> >>> On 23/07/2024 13:45, Konrad Dybcio wrote: >>> >>>> On 23.07.2024 11:59 AM, Dmitry Baryshkov wrote: >>>> >>>>> On Tue, 23 Jul 2024 at 12:48, Marc Gonzalez wrote: >>>>> >>>>>> On 16/07/2024 18:37, Dmitry Baryshkov wrote: >>>>>> >>>>>>> No, that's fine. It is the SMMU issue that Konrad has been asking you >>>>>>> to take a look at. >>>>>> >>>>>> Context: >>>>>> >>>>>> [ 4.911422] arm-smmu cd00000.iommu: FSR = 00000402 [Format=2 TF], SID=0x0 >>>>>> [ 4.923353] arm-smmu cd00000.iommu: FSYNR0 = 00000021 [S1CBNDX=0 PNU PLVL=1] >>>>>> [ 4.927893] arm-smmu cd00000.iommu: FSR = 00000402 [Format=2 TF], SID=0x0 >>>>>> [ 4.941928] arm-smmu cd00000.iommu: FSYNR0 = 00000021 [S1CBNDX=0 PNU PLVL=1] >>>>>> [ 4.944438] arm-smmu cd00000.iommu: FSR = 00000402 [Format=2 TF], SID=0x0 >>>>>> [ 4.956013] arm-smmu cd00000.iommu: FSYNR0 = 00000021 [S1CBNDX=0 PNU PLVL=1] >>>>>> [ 4.961055] arm-smmu cd00000.iommu: FSR = 00000402 [Format=2 TF], SID=0x0 >>>>>> [ 4.974565] arm-smmu cd00000.iommu: FSYNR0 = 00000021 [S1CBNDX=0 PNU PLVL=1] >>>>>> [ 4.977628] arm-smmu cd00000.iommu: FSR = 00000402 [Format=2 TF], SID=0x0 >>>>>> [ 4.989670] arm-smmu cd00000.iommu: FSYNR0 = 00000021 [S1CBNDX=0 PNU PLVL=1] >>>>>> >>>>>> >>>>>> As I mentioned, I don't think I've ever seen issues from cd00000.iommu >>>>>> on my board. >>>>> >>>>> Interestingly enough, I can also see iommu errors during WiFi startup >>>>> / shutdown on msm8998 / miix630. This leads me to thinking that it >>>>> well might be that there is a missing quirk in the iommu driver. >>>>> >>>>>> I can test a reboot loop for a few hours, to see if anything shows up. >>>>> >>>>> Yes, please. >>>> >>>> Yeah I do trust you Marc that it actually works for you and I'm not >>>> gonna delay this series because of that, but please go ahead and >>>> reboot-loop your board >>>> >>>> 8998/660 is """famous""" for it's iommu problems >>> >>> [ 20.501062] arm-smmu 16c0000.iommu: Unhandled context fault: fsr=0x402, iova=0x00000000, fsynr=0x1, cbfrsynra=0x1900, cb=0 >>> >>> I get the above warning pretty reliably. >>> I don't think it's related to the issue(s) you mentioned. >>> System just keeps plodding along. >> >> Yeah that one's "fine" > > I booted 40 times in a loop. > > `grep -a -i FSYNR console.logs` just returns the same 16c0000.iommu > "Unhandled context fault" message 76 times (as above). > > NB: I have maxcpus=1 set in bootargs. > > Could the iommu issue be a race condition, NOT triggered when code > runs with less parallelism? No clue, can you try without maxcpus=1? The thing will likely run slower (because reasons), but shouldn't explode Konrad
