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tests/TC065-vop-getpages-mmap.md

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+# 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.