detailed process from malloc to memory management

[慕冬亮]

I want to ask about the detailed process from malloc/alloca library
function to memory management.
1. malloc/alloca/realloc and so on
2. heap management in library
3. memory management in linux kernel
I only know those simple steps. How do I get the details of each step?
The source code of glibc is hard to read. This makes me annoyed.

    - mudongliang
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