Fitting Four 32 GB Resizable BARs Behind a PCIe Switch on Linux

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A technical post describes the challenge of allocating four 32 GB resizable BARs for GPUs sitting behind a PCIe switch on Linux. Resizable BAR lets the host map much larger portions of device memory, but the address space available behind a switch can become a constraint. The author documents how the configuration was approached and made to work. The post was shared on Hacker News, where it drew 10 points and 4 comments.

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