tmedicci commented on PR #13222:
URL: https://github.com/apache/nuttx/pull/13222#issuecomment-2317717242

   Hi @yamt ,
   
   
   > there seems to be a few issues.
   > 
   > * you should bump CONFIG_MM_REGIONS.
   
   Yes, this is the cause for failing the boot.
   
   > * [Increase the chance for _assert to work early in the boot 
#13233](https://github.com/apache/nuttx/pull/13233)
   
   Although this change makes sense, I didn't find any issues related direct to 
it.
   
   > * for some reason, the last page is corrupted.
   > 
   > the following is with CONFIG_MM_FILL_ALLOCATIONS=y. thus i expect it's all 
0xcc. but as you can see there are some 32byte patterns. (32byte because of 
EVENODD mode i guess) with NORMAL mode, the symptom disappears. but i guess 
NORMAL mode doen't meet the general coherency expectations for nuttx smp. do 
you have any ideas?
   
   I have no idea. After increasing the `CONFIG_MM_REGIONS`, it was able to 
boot, but `free` command fails:
   
   ```
   [CPU0] _assert: Assertion failed info.uordblks + info.fordblks == 
info.arena: at file: mm_heap/mm_mallinfo.c:157
   ```
   
   In fact, if we disable `CONFIG_DEBUG_ASSERTIONS`, `free` returns:
   ```
   nsh> free
                    total       used       free    maxused    maxfree  nused  
nfree
   esp32-imem:      98300       8628      89672       9024      89672      5    
  1
         Umem:    4402076    4263516    4398464       4008    4194288     27    
  5
   ```
   
   It isn't evaluating the used/free size correctly.


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