[Issue 13691] New: Add @nogc at the top of system modules like core.sys.linux.sys.mman

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13691

          Issue ID: 13691
           Summary: Add @nogc at the top of system modules like
                    core.sys.linux.sys.mman
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: trivial
          Priority: P1
         Component: druntime
          Assignee: nobody at puremagic.com
          Reporter: Marco.Leise at gmx.de

Trivial, but I thought I'd write it down as a formal bug report to be able to
refer to it in my code comments. There is Phobos @nogc code, which usually
means "no heap activity" and there is @nogc code that just manages memory
differently and often relies on system functions, which are not yet marked
@nogc.
E.g. I found that with madvise(..., MADV_DONTNEED) you can quickly reset memory
blocks to all-zeros and free up the resident memory pages again.

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