Linux kernel regressions
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* regressions in iommu system with 5.10.37
@ 2021-05-19  8:01 Anatoli N.Chechelnickiy
  2021-05-19  8:23 ` Greg KH
  0 siblings, 1 reply; 2+ messages in thread
From: Anatoli N.Chechelnickiy @ 2021-05-19  8:01 UTC (permalink / raw)
  To: stable; +Cc: regressions, baolu.lu, sashal


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Hi

I'm sorry to report about regression in 5.10.37

with

CONFIG_IOMMU_IOVA=y
CONFIG_IOMMU_API=y
CONFIG_IOMMU_SUPPORT=y
CONFIG_OF_IOMMU=y
CONFIG_INTEL_IOMMU=y
CONFIG_INTEL_IOMMU_SVM=y
CONFIG_INTEL_IOMMU_DEFAULT_ON=y
CONFIG_INTEL_IOMMU_FLOPPY_WA=y

and iommu=on in grub.cfg


All my dell r340 and all lenovo servers won't boot any more. Just black 
screen at once.


with intel_iommu=on iommu=pt DELL R240 and Lenovo SR350 cat boot

Older Lenovo cannot boot even with "intel_iommu=on iommu=pt" only with 
iommu=off in grub

With iommu=off in grub all servers are booting well

With 5.4.36 do not have this problem


tested last 4 days with 10+ different servers(


-- 
Best regards,
Anatoli N. Chechel'nickiy
Senior expert of IT security department


Phone: +380 562 7474 200


Anatoli.Chechelnickiy@interpipe.biz
www.interpipe.biz



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2021-05-19  8:01 regressions in iommu system with 5.10.37 Anatoli N.Chechelnickiy
2021-05-19  8:23 ` Greg KH

Linux kernel regressions

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