notes

1. vmalloc for large pfns
2. check for illegal attachments(address range)
3. optimize remap pfn loop
4. check if there is redundant pinning
5. FOLL_PIN/FOLL_LONGTERM
6. faultin_page_range?
7. faultin_page
8. follow page mask is it supported by hardware?
9. handling the hugetlb
10. add statistics to the pinner, check the data
11. major fault and minor fault?
12. Free the arrarys!!!!!!Do check
13. huge page?
14. PAGE ALIGNMENT CHECK
15. add protection to attachment!
tenstorrent 
alamo by bright well

For performance test
1. delete all irrelevant pr_info
2. check for all stat info 
3. timer delete
cma_pin_single_page_v1(delete the log here, watch out not v0)
utils.h
export
remove
main logic

ATTACHMENTS are leaking
stress for collective