Bug#1146579: src:linux: use iommu passthrough by defaul

From	Mathieu Parent <math.parent@etik.com>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1146579: src:linux: use iommu passthrough by defaul
Date	2026-09-03 14:00 +0200
Message-ID	<NzegN-eWsE-1@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Package: src:linux
Version: 7.1.12-1
Severity: wishlist

Dear Maintainer,

As several other distros have done in the previous years [ref1], it
would be good to configure DMA to bypass the IOMMU by default.

This is recommended for performance, for example for MinIO [ref2]
[ref3].

This can be done with:

CONFIG_IOMMU_DEFAULT_PASSTHROUGH=y

Regards

Mathieu Parent

[ref1] https://lenovopress.lenovo.com/lp1467.pdf#G3.499858
[ref2]
https://docs.min.io/aistor/installation/checklists/hardware-tuning/#memory
[ref3]
https://docs.min.io/aistor/operations/performance-tuning/#bootloader-settings

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Bug#1146579: src:linux: use iommu passthrough by defaul Mathieu Parent <math.parent@etik.com> - 2026-09-03 14:00 +0200

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