[pve-devel] [PATCH pve-kernel] d/rules: kconfig: do not enable intel_iommu by default

Stoiko Ivanov s.ivanov at proxmox.com
Fri May 13 10:57:39 CEST 2022


enabling this causes quite a few issues with older hardware
(hp g8, and the like) - and most of our guides do call for enabling it
where needed (pci passthrough).

the setting was off in the 5.13 series.

following reports of disabling intel_iommu explicitly fixing the
issues in our community forum:
https://forum.proxmox.com/threads/.109368

Signed-off-by: Stoiko Ivanov <s.ivanov at proxmox.com>
---
tested by installing on a HP G8 (and starting a minimal VM and running
stress-ng -d 2 for a minute), and on 2 VMs

alternatively we could document this in the 7.2 release notes and ask
users of problematic hardware to set this explicitly

 debian/rules | 1 +
 1 file changed, 1 insertion(+)

diff --git a/debian/rules b/debian/rules
index 1ec1147..d648d95 100755
--- a/debian/rules
+++ b/debian/rules
@@ -44,6 +44,7 @@ PVE_CONFIG_OPTS= \
 -m CONFIG_BLK_DEV_NVME \
 -e CONFIG_NLS_ISO8859_1 \
 -d CONFIG_INPUT_EVBUG \
+-d CONFIG_INTEL_IOMMU_DEFAULT_ON \
 -d CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND \
 -d CONFIG_CPU_FREQ_DEFAULT_GOV_SCHEDUTIL \
 -e CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE \
-- 
2.30.2





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