Play with the userfaultfd(2) system call and download on demand using HTTP Range Requests with Golang
an idea by rbranco
Updated about 10 hours ago. No love. 1 follower. Has no hacker: grab it!

Description

The userfaultfd(2) is a cool system call to handle page faults in user-space. This should allow me to list the contents of an ISO or similar archive without downloading the whole thing. The userfaultfd(2) part can also be done in theory with the PROT_NONE mprotect + SIGSEGV trick, for complete Unix portability, though reportedly being slower.

Goals

  1. Create my own library for userfaultfd(2) in Golang.
  2. Create my own library for HTTP Range Requests.
  3. Complete portability with Unix.
  4. Benchmarks.
  5. Contribute some tests to LTP.

Resources

  1. https://docs.kernel.org/admin-guide/mm/userfaultfd.html
  2. https://github.com/loopholelabs/userfaultfd-go
  3. https://github.com/DHowett/ranger
  4. https://www.cons.org/cracauer/cracauer-userfaultfd.html

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Activity

  • about 10 hours ago: rbranco originated this project.


    • Comments

    • rbranco
      about 10 hours ago by rbranco | Reply

      Golang library for userfaultfd created: https://github.com/ricardobranco777/go-userfaultfd

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