| Age | Commit message (Collapse) | Author | 
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|  | Microsoft defines `MEM_RESERVE_PLACEHOLDER` as `0x00040000`, but our
manually imported version of it drops the last zero. | 
|  | This falls back to the old approach of using a virtual buffer.
Windows is untested, but this build should fix support for Windows < 10 v1803. However without fastmem support at all. | 
|  | Workaround old headers and libraries shipped on MinGW. | 
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|  | In theory, if we have 2 MB continously mapped, this should save one layer of TLB.
Let's make it at least more likely by aligning the memory. | 
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