Re: [PATCH v3 0/6] media: iris: prepare support for video codecs on Qcom vpu4 platform

[Bryan O'Donoghue]

On 12/11/2025 05:09, Vikash Garodia wrote:
> > One additional bonus is that fluster runs several process in parallel
> > by default, catching issues caused by several decode threads running
> > in parallel.
> multi process issue is due to below [1] (tried it on lemans). Due to
> higher concurrency, we can see that the DMA buffer is mapped into
> un-addressable range (0-0x25800000) i.e 0x24b00000, and leading to
> global fault. This was the reason i was keeping 2 memory-region in
> kaanapali binding, to restrict certain ranges of IOVA.

If that is currently true then we should restrict concurrent sessions 
entirely unless/until it can be safely supported.

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bod