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A comment on FreeBSD on Firecracker. Parent comment

Re:FreeBSD on Firecracker by caskstrength on Friday August 25, 2023 @05:42AM (#37259804)
> Linux itself has plenty of support for TCP offload engines

Could you link to any specific Linux kernel source that implements support for TCP offload? AFAIK networking subsystem maintainers were always opposed to accommodate TCP offload because it is A Bad Idea.

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Re:FreeBSD on Firecracker by packetlost on Friday August 25, 2023 @10:23AM (#37262070)
I know there's a few userspace networking APIs such as DPDK [0]. Or maybe there's something in KVM code that implements it. If so, it's news to me!

[0]: https://www.linuxjournal.com/content/userspace-networking-dp...

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Re:FreeBSD on Firecracker by yencabulator on Friday August 25, 2023 @03:20PM (#37265988)
At its simplest, TCP offload can be just letting the hardware chunk a large packet into smaller ones on the wire. I don't think anything trying to offload more than that has really seen much daylight outside of very proprietary "smart NICs".

https://www.kernel.org/doc/Documentation/networking/segmenta...

https://wiki.linuxfoundation.org/networking/tso

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