Re: [PATCH v2 11/11] powerpc/64s/slb: Add no_slb_preload early cmdline param

pavrampu [off-list ref] writes:

Thanks for the patches, I have verified patches with below tests and no 
issues are observed.

Run below tests in hash mode
1. slb multihit error injection module, test from 
https://github.ibm.com/mahesh-salgaonkar/mce_err_inject.git
    [ insmod mcetest_slb.ko ]
2. perf stat -e context-switches hackbench -l 1000 -g 50
3. perf stat -e context-switches stress-ng --cpu 0 --timeout 60s
4. Regression tests:
LTP mm tests
HTX mdt.mem
stress-ng Memory
memtester
kselftest
5. Boot with dyndbg="file arch/powerpc/mm/book3s64/hash_utils.c +p" and 
check there are no errors
6. echo "file arch/powerpc/mm/book3s64/hash_utils.c +p" > 
/sys/kernel/debug/dynamic_debug/control
7. Verify hash mmu messages in dmesg
# dmesg | grep -Eai "Page orders"
# dmesg | grep -Eai "Using 1TB"
# dmesg | grep -Eai "Huge page(16GB)"
8. hpt_order is updated properly based on "Maximum Memory" value and it 
is no affected by dlpar operations.
9. Boot lpar in radix mode and verify 
/sys/kernel/debug/powerpc/hpt_order is not available
10.Boot lpar in hash mode and check DirectMap16M has valid value,
11. Verify DirectMap16M is updated properly with memory dlpar 
operations.
12. Create devdax device and check DirectMap16M is updated, Convert it 
to system RAM and back to devdax and verify DirectMap16M
13. Boot kernel in radix mode and /sys/kernel/debug/kernel_page_tables 
has PXX level info.
14. Boot lpar with no_slb_preload cmd line argument systemd-analyze with 
and without no_slb_preload
15. Check slb_faults with and without no_slb_preload
16. kdump/fadump on 1TB system with above patches in radix and hash 
mode.
17. 31TB P8 system boot with above patches


Feel free to add:
Tested-by: Pavithra Prakash (IBM) <redacted>

Thanks a lot Pavithra for an extensive testing of this patch series!

-ritesh