Re: [RFC PATCH] iommu: Default to lazy DMA mode on ARM64

[Jason Gunthorpe]

On Fri, Apr 03, 2026 at 02:28:17AM +0000, Pranjal Shrivastava wrote:

> Thanks for the patch and the benchmarks.
> 
> However, I'm not sure why should we change the compile-time default for
> all ARM64 systems? Currently, users can already achieve this behavior by
> using the `iommu.strict=0` boot parameter.

Personally I really dislike these rando arch specific things.

What justification is there for any arch to be unique here?

I'd expect a single kconfig 'try to be strict by default' and that's
it. No arch override.

Jason