linux-kernel - Re: [PATCH] iommu: intel: remove flooding of non-error logs, when new-DMA-PTE is the same as old-DMA-PTE.

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Message-ID: <CAHP4M8Us753hAeoXL7E-4d29rD9+FzUwAqU6gKNmgd8G0CaQQw@mail.gmail.com>
Date:   Sat, 2 Oct 2021 22:48:24 +0530
From:   Ajay Garg <ajaygargnsit@...il.com>
To:     Lu Baolu <baolu.lu@...ux.intel.com>
Cc:     linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org,
        kvm@...r.kernel.org, "Tian, Kevin" <kevin.tian@...el.com>
Subject: Re: [PATCH] iommu: intel: remove flooding of non-error logs, when
 new-DMA-PTE is the same as old-DMA-PTE.

Thanks Lu for the reply.

>
> Isn't the domain should be switched from a default domain to an
> unmanaged domain when the device is assigned to the guest?
>
> Even you want to r-setup the same mappings, you need to un-map all
> existing mappings, right?
>

Hmm, I guess that's a (design) decision the KVM/QEMU/VFIO communities
need to take.
May be the patch could suppress the flooding till then?



Thanks and Regards,
Ajay