Glossary · term07 of 202
9P protocol
The network file-sharing protocol WSL2 uses to let Linux reach files on the Windows drive. Every read, write, or stat under /mnt/c travels over it, which is why those operations run far slower than native Linux filesystem calls.
also written as 9p · plan 9 filesystem protocol
Related terms
drvfsThe filesystem driver WSL2 uses to mount Windows drives like C into the Linux side. Any path under drvfs, such as /mnt/c, pays the 9P protocol tax that a native ext4 path never does.view termwslpathA WSL command-line utility that converts a file path between its Linux form and its Windows form, so a tool on either side can use it correctly.view term
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- jul 2026
