Re: [PATCH 0/2] iommu/arm-smmu-v3: SMMU hitting kdump mid-air

[Breno Leitao]

On Fri, Sep 11, 2026 at 07:54:43AM -0700, Breno Leitao wrote:
> I've found that kdump does not work on some ARM host, such as AWS
> Graviton metal, and the SMMU is what seems to kills it.
>
> The capture kernel dies about a second after it resets the SMMU, part
> way through PCI enumeration, and takes the machine with it.
>
> There is no panic and no oops: the console stops mid-line and the box
> reboots, leaving no vmcore, no log and nothing on disk. Crashes on this
> hardware mostly produce no dump at all.
>
> This is my theory, from an "outsider view":

This should really have been tagged RFC — apologies for missing that.