Re: [PATCH rc v7 0/7] iommu/arm-smmu-v3: Fix device crash on kdump kernel

From: Mostafa Saleh

Date: Wed Jul 01 2026 - 06:00:50 EST


On Tue, Jun 30, 2026 at 12:27:32PM -0700, Nicolin Chen wrote:
> (I think Jason has answered most of the questions here.)
>
> On Tue, Jun 30, 2026 at 01:17:30PM +0000, Mostafa Saleh wrote:
> > For example, patch 4 disables the EVTQ to avoid events as there might
> > be a lot, why are they not fatal also?
>
> FWIW, the PATCH-4 doesn't disable the EVTQ: EVTQ is disabled in
> kdump case prior to the series; PATCH-4 just makes sure it won't
> get enabled transiently.

Yes, I meant the patch disabling it even transiently because of DMA
faults, which was confusing to me because I though they are fatal anyway,
but I see Jason’s explanation now.

Thanks,
Mostafa

>
> Nicolin