Always use memset along with malloc, or always use calloc.
始终结合使用memset和malloc，或始终使用calloc。
A good practice is to always use memset along with malloc, or always use calloc.
良好的实践是始终结合使用memset和malloc，或者使用calloc。
After reaching around 550mb, the test program was killed by the kernel when it tried to memset a block.
在达到大约550 MB之后，当测试程序试图memset一个内存块时，内核杀死它。
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