[vs]: Increase swiotlb size to support multi-asic VS #6674
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Signed-off-by: SuvarnaMeenakshi <[email protected]>
SuvarnaMeenakshi
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lguohan,
rlhui,
judyjoseph,
arlakshm and
abdosi
lguohan
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Feb 4, 2021
abdosi
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Feb 26, 2021
…6674) Current mutli-asic vs hwsku consists of 6 asics with each asic having 32 interfaces. When bringing this up, below issue was seen: When all 32 interfaces in each namespace (sonic interfaces and linux interface) is set to 9100 mtu, DMA error is seen "DMA: Out of SW-IOMMU space for 4096 bytes at device 0000:06:03.0" which can be fixed by updating swiotlb=65536 in /host/grub/grub.cfg . Signed-off-by: SuvarnaMeenakshi <[email protected]>
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- Why I did it
Current mutli-asic vs hwsku consists of 6 asics with each asic having 32 interfaces.
When bringing this up, below issue was seen:
When all 32 interfaces in each namespace (sonic interfaces and linux interface) is set to 9100 mtu, DMA error is seen "DMA: Out of SW-IOMMU space for 4096 bytes at device 0000:06:03.0" which can be fixed by updating swiotlb=65536 in /host/grub/grub.cfg .
- How I did it
Add ONIE_PLATFORM_EXTRA_CMDLINE_LINUX parameter in virtual platform's installer.conf which will get picked up in install.sh.
- How to verify it
Bring up a single asic/multi-asic VS, check the file /host/grub/grub.cfg. This file should have swiotlb=65536.
Also, dmesg logs after boot up should have swiotlb added in kernel cmdline.
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