On: Io_uring Without Readahead

[withinboredom]

10 gb per second is pretty slow for a disk. You should be seeing much higher than that.

[marginalia_nu → withinboredom]

??? The only configuration that will allow disk reads at 10 GB/s is if you're using PCIe 5.0. PCIe 4.0 or lower, and SATA will not drop out long before that.

He's very clearly hauling data straight from the page cache.