llnl / llnl/UnifyFS

mmap wrappers incomplete

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Dominant language
C
Stars
122
Forks
34
PR merge metrics
No merged PRs in 30d

Description

Consider adding support for:

  • mmap
  • msync
  • munmap

To support mmap, we'll need a data structure to track memory regions that have been assigned to serve unifycr files so that we can distinguish our memory regions from normal system memory regions in calls to munmap and msync.

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by tracing the existing memory-mapping wrapper entry points and how UnifyFS file regions are represented. Review the mmap, msync, and munmap requirements, including how assigned regions must be distinguished from normal system memory. Done means all three wrappers are supported and region tracking prevents incorrect handling of unrelated mappings.

Written by the indexing model from the issue text.

Assessment

Tech stack
c
Domain
operating-systems
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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