# Test Case: mmap Through VOP_GETPAGES

**Test ID**: TC065-vop-getpages-mmap
**Category**: VM Integration
**Priority**: Critical

## Objective

Verify page-fault-driven reads, EOF semantics, and private/shared mapping
behavior for plain and compressed EROFS files.

## Procedure

On separate fresh mounts of vfs/vfs-plain.erofs and vfs/vfs-lz4.erofs:

    ./mmap_fault /tmp/repo22-g3/mnt/pager.bin

## Expected Results

Random and sequential mapped bytes match pread exactly; the partial EOF page
is zero, the next full page produces the helper's expected child SIGBUS,
writable MAP_SHARED is EACCES, MAP_PRIVATE COW succeeds, and O_RDWR is EROFS.
The plain and LZ4 logical FNV hashes are identical. Direct read utilities are
not acceptance evidence. Record dmesg and cleanup.