I didn't mean to imply that the linux driver is of poor quality. It's just a matter of the kernel's inability to schedule "soft interrupt" handlers with low eno

I didn't mean to imply that the linux driver is of poor quality. It's just a matter of the kernel's inability to schedule "soft interrupt" handlers with low enough jitter to guarantee the hardware is serviced fast enough. The MCP2515 certainly doesn't make it easy as it only has two RX mailboxes without FIFO semantics. It's kind of funny because any old 8-bit MCU has plenty of oomph to reliably drive an MCP2515 but rediculously powerful 64-bit SoC boards can't handle it.