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[PCA 2.x / OVM] Compute Node (dom0) Reports "swiotlb buffer is full" (Doc ID 2483637.1)

Last updated on AUGUST 24, 2022

Applies to:

Oracle VM - Version 3.2.1 and later
Private Cloud Appliance - Version 2.1.1 and later
Generic Linux

Symptoms

The symptom is system log keep reporting "swiotlb buffer is full".

Aug 13 07:21:41 ovcacn07r1 kernel: [2607021.026958] mlx4_core 0000:13:00.0: swiotlb buffer is full
Aug 13 07:22:03 ovcacn07r1 kernel: [2607043.410263] mlx4_core 0000:13:00.0: swiotlb buffer is full (sz: 262144 bytes)
Aug 13 07:22:03 ovcacn07r1 kernel: [2607043.410267] mlx4_core 0000:13:00.0: swiotlb buffer is full

Increase kernel option "swiotlb" per Doc ID 2324886.1 may mitigate the issue, but same messages could be seen after some time.

Cause

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In this Document
Symptoms
Cause
Solution
References


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