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Posted to commits@nuttx.apache.org by GitBox <gi...@apache.org> on 2022/03/30 17:37:12 UTC

[GitHub] [incubator-nuttx] xiaoxiang781216 commented on a change in pull request #5914: mm/mm_heap: MMSIZE_MAX should be half of UINT16_MAX/UINT32_MAX.

xiaoxiang781216 commented on a change in pull request #5914:
URL: https://github.com/apache/incubator-nuttx/pull/5914#discussion_r838803259



##########
File path: mm/mm_heap/mm.h
##########
@@ -130,10 +130,10 @@
 
 #ifdef CONFIG_MM_SMALL
 # define MM_ALLOC_BIT    0x8000
-# define MMSIZE_MAX      UINT16_MAX
+# define MMSIZE_MAX      (UINT16_MAX >> 1)

Review comment:
       it's better to move the special bit to the low end since heap always allocate the memory at least 2bytes alignment.




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