On Wed, 19 Jan 2022 07:07:54 +0000, Zhou Guanghui wrote:
> During event processing, events are read from the event queue one
> by one until the queue is empty.If the master device continuously
> requests address access at the same time and the SMMU generates
> events, the cyclic processing of the event takes a long time and
> softlockup warnings may be reported.
>
> arm-smmu-v3 arm-smmu-v3.34.auto: event 0x0a received:
> arm-smmu-v3 arm-smmu-v3.34.auto: 0x00007f220000280a
> arm-smmu-v3 arm-smmu-v3.34.auto: 0x000010000000007e
> arm-smmu-v3 arm-smmu-v3.34.auto: 0x00000000034e8670
> watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [irq/268-arm-smm:247]
> Call trace:
> _dev_info+0x7c/0xa0
> arm_smmu_evtq_thread+0x1c0/0x230
> irq_thread_fn+0x30/0x80
> irq_thread+0x128/0x210
> kthread+0x134/0x138
> ret_from_fork+0x10/0x1c
> Kernel panic - not syncing: softlockup: hung tasks
>
> [...]
Applied to will (for-joerg/arm-smmu/updates), thanks!
[1/1] iommu/arm-smmu-v3: fix event handling soft lockup
https://git.kernel.org/will/c/30de2b541af9
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
_______________________________________________
iommu mailing list
[email protected]
https://lists.linuxfoundation.org/mailman/listinfo/iommu
