Add noaer_recovery and nodpc pci kernel boot option#583
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What is the upstreaming plan for these patches? |
AER error recovery is part of the AER error handling subsystem in the Linux kernel. AER is enabled by default in the SONiC Linux kernel. The default Linux behavior is incompatible with Arista chassis hardware architecture. Enabling AER recovery on large modular systems with a complex PCIe tree could cause unexpected behavior and side effects. It would be nice to have an option to disable AER recovery on some chassis. Add pci=noaer_recovery kernel boot option to disable AER error recovery when an uncorrectable error is reported. Signed-off-by: Yury Murashka <yurypm@arista.com>
PCI DPC (Downstream Port Containment) is enabled by default in the SONiC Linux kernel. DPC support can be advertised by PCIe devices, but it might not be fully supported in the firmware. The default Linux behavior is incompatible with Arista chassis hardware architecture. Enabling DPC could cause unexpected behavior and side effects. It would be nice to have an option to disable DPC on some chassis. Add pci=nodpc kernel boot option to disable PCI DPC. Signed-off-by: Yury Murashka <yurypm@arista.com>
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I don't think that there is any chance that these patches will be accepted into upstream. |
Contributor
Please send them to be sure. They are already properly formatted, so please send them upstream. |
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Done. https://lore.kernel.org/linux-pci/20260602105558.1799563-1-yurypm@arista.com/T/#t |
saiarcot895
approved these changes
Jun 9, 2026
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PCI DPC (Downstream Port Containment) is enabled by default in the SONiC Linux kernel. DPC support can be advertised by PCIe devices, but it might not be fully supported in the firmware. The default Linux behavior is incompatible with the Arista chassis hardware architecture. Enabling DPC could cause unexpected behavior and side effects.
It would be nice to have an option to disable DPC on some chassis.
AER error recovery is part of the AER error handling subsystem in the Linux kernel. AER is enabled by default in the SONiC Linux kernel. The default Linux behavior is incompatible with the Arista chassis hardware architecture. Enabling AER recovery on large modular systems with a complex PCIe tree could cause unexpected behavior and side effects.
It would be nice to have an option to disable AER recovery on some chassis.
Add pci=noaer_recovery kernel boot option to disable AER error recovery when an uncorrectable error is reported.
Add pci=nodpc kernel boot option to disable PCI DPC.